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A spatial explicit scenario method to support participative regional land-use decisions regarding economic and ecological options of short rotation coppice (SRC) for renewable energy production on arable land: case study application for the Göttingen district, Germany



Renewable energy (RE) production is a land-use driver with increasing impact on landscape configuration and a matter of controversial debate. Woody biomass cropping provides an opportunity to interlink RE supply with spatial planning goals, RE concepts and rural development programmes since it tackles several issues, ranging from climate or soil protection to over food production and income diversification as well as new and additional regional value cluster. Participatory scenario generation supported by interactive visualization tools facilitates the development of joint goals regarding local land-use decisions.


Based on a stakeholder dialogue in the rural district of Göttingen, two scenarios were quantified and analysed. Reflecting a farmer-oriented economic perspective in (a) “Income first” and an integration of economic and ecological aspects in (b) “Ecological benefits”, the two scenarios address opportunities and constraints of poplar short rotation coppice (SRC) in comparison to three common crop rotations in the case study area. Suitable SRC parcels were determined by linking yield modelling results of annual reference crops and poplar SRC with ecological indicators of water-induced soil erosion and ecotone density as well as with annuity calculation and a risk assessment (stochastic dominance) based on the Monte Carlo simulation of price and yield fluctuation.


SRC was economically superior (stochastically first-order dominant) to all three reference crop rotations (oilseed rape-wheat-barley; maize-wheat-maize-wheat; oilseed rape-wheat-wheat) on 1800 ha or 4.9% of the arable land. With a positive annuity difference ranging between 63 and 236€ ha−1 a−1 SRC provides an opportunity to diversify farmers’ income. The primary energy supply from the suitable land parcels accounted for 130 GWh a−1 or 8% of the RE supply in 2030 strived for by local climate protection goals. Around 50% of the 1800 ha are suitable as focal areas for a joint consideration of farmers’ income, erosion protection and structural enrichment. The related average economic trade-off on annuity differences for the gain of substantially increased ecological benefits is about 17€ ha−1 a−1 (13%).


Linking ecological criteria assessment with dynamic investment calculation and risk evaluation in a joint methodology revealed that SRC is an economic viable alternative for renewable energy production and can provide ecological synergies in terms of erosion protection and structural enrichment. The presented methodology is transferrable and allows to visualize stakeholder-based scenarios with an agreed identification of opportunities and constraints that come with SRC on arable land. This helps to better integrate local land-use decisions with formal and informal spatial planning goals.


In 2009, the European Union set the agenda to reduce greenhouse gas emission, diminish energy consumption and increase the utilization of renewable energy by 20% until 2020 in relation to the 1990 levels [1]. The goal setting in Germany was even more ambitious when ratifying a 40% reduction of greenhouse gas emission and increasing the share of renewable energy consumption to 25–30% until 2020 [2]. In 2014, the European Council set the binding EU-level target to at least 27% for the share of renewable energy consumed in the EU in 2030 [3], and Germany is trying to accelerate its energy transition pathway aiming at providing 55 to 60% of the electricity consumed from renewables by the year 2035 [4].

In 2006, an EEA study [5] estimated that 15% of projected European energy demand in 2030 could be met with bioenergy derived from European agricultural, forestry and waste products. Referring to the 2014 European Council renewable energy targets, this would translate to a biomass supply share of around 60%. Woody biomass already plays a key role among renewable energy sources, providing around 50% of the primary production of renewable energy [6]. However, currently, the vast majority of wood resources for renewable energy production originates from forests, whereas lignocellulosic crop production on agricultural land occupies only a small niche with largest wood production from short rotation coppice (SRC) in the UK, Sweden and Poland [7].

In Germany, SRC currently accounts only for 9000 ha of arable land [8] although biomass cropping has been stimulated by the German Renewable Energy Sources Act and its subsequent amendments since 2000 [9]. As a result, a strong increment of energy crop cultivation, especially maize for biogas production and oilseed rape for biodiesel and blending of fossil fuels took place in the last decade. The associated substantial change of landscapes challenges different actors and sectors and needs innovative approaches to integrate sectoral goals.

With around 2.2 Mio ha of agricultural land in 2015 (13.2%), the spatial demand for energy crop cultivation almost tripled between 2000 and 2015. This rapid and regionally often unbalanced development has caused a considerable increase of land rents and a conversion of pasture to arable land which has raised concern of civic, public and scientific communities (e.g. [1012]) regarding environmental impacts as well as ethical questions concerning the food production versus fuel cropping on agricultural land.

In this area of conflict, lignocellulosic crops have not become a common feature of agriculture in Germany yet although they do not only provide woody biomass at low CO2 avoidance costs [1315] but also contribute to sustain several ecosystem services such as erosion protection [1618], groundwater protection [19], habitat creation [2023] or structural enrichment [2426].

Boll et al. [27] conclude from literature studies and regional surveys that apart from economic uncertainties such as the contribution of SRC to income generation, diversification and local added value, the wide range of regulations, laws and perceptions of local authorities hampering a short planning—and approval time is perceived as a major disadvantage of SRC. However, poplar SRC in Germany can be economically competitive to annual crops [2830] given a proper site selection as well as a suitable business model for the wood chip production. Further, regarding the necessity of an of ongoing substitution of fossil fuels with biomass sources [3134], lignocellulosic crops as SRC or agroforestry systems (AFS) provide an excellent opportunity to promote decentralized energy supply on a local to regional scale accompanied by environmental and sustainability aspects such as protecting biodiversity, soil fertility or water quality on agricultural land.

Thus, apart from spreading economic success-stories (e.g. [35, 36]) and transferring scientific knowledge to practice [37], it is crucial to work on participatory communication and decision support strategies with local actors and politics to overcome perception barriers [30, 38, 39] and to trigger local implementation projects.

Landscape transformation due to the German Renewable Energy Sources Act and the German “Energiewende” (transition from nuclear and fossil fuels to renewable energy supply) is an actual challenge to all German regions [40]. Tackling this challenge is hampered since biomass cropping is subject to several sectoral objectives, e.g. from spatial planning, regional renewable energy concepts and regional rural development programmes such as the EU-funded LEADER initiative [4143].

A participative scenario generation process supported by interactive visualization tools provides one opportunity to interlink these objectives by facilitating the complex negotiation process between various stakeholder groups and local key players.

A workshop series during the BEST project with more than 100 local actors held in the rural district of Göttingen (“RDG”), Germany, provided the basis for the scenario application presented in this contribution. The major goal identified during this dialogue was to point out the potential of SRC in diversifying local renewable energy production and to find suitable areas for SRC cropping in RDG.

To meet the goals from the stakeholder dialogue, two scenarios (a) “income first” and (b) “ecological benefits” were generated and quantified. The scenario quantification procedure elaborates the methodology laid out for BEAST, the “Bio-Energy Allocation and Scenario Tool” [29, 30, 44] which was developed during the BEST project (2010–2014,

Reflecting a farmer-oriented economic perspective in (a) “income first” and an integration of economic and ecological aspects in (b) “ecological benefits”, the two scenarios address opportunities and constraints of poplar short rotation coppice (SRC) in comparison to three common crop rotations in the case study area. Suitable SRC parcels were determined by linking yield modelling results of annual reference crops and poplar SRC with ecological indicators of water-induced soil erosion and ecotone density as well as with annuity calculation and a risk assessment (stochastic dominance) based on the Monte Carlo simulation of price and yield fluctuation.

In the results section, suitable areas with respect to the role lignocellulosic crops can play for local renewable energy production, climate protection, sustainable land management issues and farmer’s income are identified according to the scenario settings. Results are presented in aggregated form for the RDG and the municipality level. A mapping example illustrates the spatial pattern of suitable SRC sites and depicts synergies and trade-offs on the parcel level. The discussion comprises the appraisal of the approach and leads to the conclusions addressing further options of decision-making support on a local to regional scale.


Study area

“RDG” covers around 1118 km2, 55% of which is used for agriculture (Fig. 1). Arable parcels are the spatial reference for this study and account for more than 80% (47,000 ha) of the agricultural area. The land cover pattern is diverse: a mixture of forest, arable land and pasture constitutes a varied set of mosaic landscapes with the central and eastern region dominated by arable land and the western; hilly part is shaped by larger forest patches. Natural growth conditions for SRC are quite suitable [45, 46] in a German context, given an average annual precipitation of around 700 mm (1981–2010, derived from DWD 1 km grid information), a mean annual temperature of 8.9 °C (1981–2010, derived from DWD 1 km grid information) [47] and a majority of medium to high productive soils [48, 49]. The location of biogas plants as a potential option to dry wood chips with waste heat was derived from a data compilation persistently published by the German Society for Solar Energy [50] and was cross-checked with the local energy agency.

Fig. 1
figure 1

The rural district of Göttingen as study area

Stakeholder dialogue and participatory scenario generation

The interest in SRC as additional source of local renewable energy supply results from ambitious climate protection goals [42]. RDG, as a typical example of German districts, is aiming at reducing their local energy demand and increasing the supply of renewable energy. RDG intends to reduce the energy demand by 30% until 2030 and to expand the local renewable energy supply to cover 60% of the energy demand in 2030. Half of this renewable energy supply shall originate from biomass sources.

Various aspects were identified by the stakeholders to define “suitable” sites for SRC. First, as the local farmers’ association pointed out, farmers need quantitative information on the economic return of SRC in comparison to the common annual crops of the study area to consider SRC as an option of income diversification. Further, due to the increasing number of biogas plants in the study area, local farmers and energy co-operatives as operators of biogas plants were interested in knowing if using waste heat from biogas for drying of wood chips would be an economically feasible option.

Second, “RDG” is very much exposed to soil water erosion [11] and shows deficits of woody structures in many parts of the agricultural landscape [41]. Therefore, local actors (environmental associations and local nature conservation and planning agency) considered the role SRC could play in erosion prevention and structural enrichment as a very valuable contribution to meet existing planning goals. Third, synergies between economic and environmental aspects were considered as a key issue for a more integrated land-use concept in the study area. In that respect, it was agreed upon to give the economic return a higher weight within a combined evaluation of the economic and ecological site suitability. Additionally, some spatial allocation rules were formulated: (a) Only arable land was considered for the SRC site selection since the conversion of pasture poses potential environmental concerns [51, 52], (b) SRC should be excluded from NATURA 2000 areas (SPA and SAC), (c) to draw buffer zones around humid-sensitive areas to avoid potential negative impacts due to increased water consumption of SRC [24] and (d) to limit the SRC parcel size and SRC share in agricultural landscapes to avoid negative effects on scenic beauty and biodiversity [26].

As a result of this dialogue two scenarios are quantified in this study. In the “income first” scenario, farmers are the key players. The focus is on finding suitable arable sites to grow lignocellulosic crops for local energy supply which are economically competitive to common local crop rotations.

In scenario 2, “ecological benefits” merges the interests from farmers, spatial planning and climate protection goals by combining competitive economic return from SRC with ecological services provided by SRC, namely erosion protection on erosion-prone arable parcels and structural enrichment in homogenous agricultural landscapes with a lack of woody structures as illustrated by regional spatial planning maps [41].

Both scenarios come with two value-chain alternatives for the farmer: (a) selling-off the fresh wood chips and (b) drying the wood chips with waste heat from biogas plants and selling the dried wood chips.

Scenario quantification

The scenario quantification for the two scenarios (a) “income first” and (b) “ecological benefits” covers a time period of 20 years. The overall quantification procedure is illustrated by Fig. 2 for the “ecological benefits” scenario. It shows that suitable SRC sites were identified in comparison to annual reference crop rotations by combining quantitative input information with indicator-based criteria evaluation and spatial filter rules.

Fig. 2
figure 2

Overview of the scenario quantification and evaluation procedure

To catch the economic perspective of the “income first” scenario, annuities of the selected crop rotations (“The reference cropping systems—comparing a poplar SRC with selected crop rotations” section) and two SRC wood chip production pathways were calculated (see “Wood chip production pathways” and “Yield and yield increase” sections). These annuities (“Annuity calculation”–“Linking annuity calculation with yield and price fluctuations” sections) were subject to a Monte Carlo simulation (MC) with 10,000 variations for each parcel to address their impact of price and yield fluctuations on the economic return. Finally, the concept of stochastic dominance was applied to the MC results (“Selecting economic competitive SRC sites based on the concept of stochastic dominance” section) to identify parcels where SRC is economically superior to the reference crop rotations.

The “ecological benefits” scenario integrates the economic perspective and selected ecological effects of SRC compared to the annual reference crop rotations by addressing the indicators “annuity difference”, “potential soil erosion” and “ecotone density” (Fig. 2, and “Potential soil erosion” and “Ecotone density” sections). As part of the multi-criteria assessment, the indicators were evaluated towards the criteria “economic competitiveness”, “prevention from soil erosion” and “structural enrichment”. The resulting criteria values were weighted to derive the final total score value that expresses the arable parcel suitability (see “Indicator evaluation” section).

The final score was calculated with two approaches to emphasize (a) the average score value and (b) the maximum score of at least one criterion (see “Final score calculation” section). In combination with the designated spatial filter rules (“Applying spatial filter rules” section), the suitable areas were selected.

The reference cropping systems—comparing a poplar SRC with selected crop rotations

Wheat, oilseed rape, sugar beet, barley and, more recently, maize, are the important annual crops in the rural district of Göttingen [53, 54]. The most prominent crop rotations associated with these crops are “wheat-wheat-sugar beet” (WWSB), “oilseed rape-wheat-barley” (ORWB), “oilseed rape-wheat-wheat” (ORWW) and “maize-wheat-maize-wheat” (MWMW).

For the two scenarios presented in this study, a poplar SRC in a 5-year rotation (7000 cuttings) was compared to the three annual crop rotations, (a) “ORWB”, (b) “MWMW” and (c) “ORWW”, in terms of economic return and effects on soil erosion risk and landscape structure. A comparison between SRC and a “WWSB” rotation is not presented in this study since a pre-analysis revealed that this crop rotation economically outcompeted SRC under any circumstances. As a consequence, around 8300 ha was identified as preferable parcels for a “WWSB” rotation by taking soil quality and slope as selection criteria and therefore excluded from the analysis in this study. This number reflects the actual statistics of sugar beet area in a “WWSB” rotation for the Göttingen district [54] and accounts for about 18% of the arable land total (47,056 ha). The spatial distribution of these sites is depicted in Fig. 1.

Wood chip production pathways

Two pathways of wood chip production were selected which are at the very beginning of possible supply chains and associated business models (e.g. [35, 55, 56]) a farmer could be part of: (a) sale of fresh wood chips within a transport distance of 20 km and (b) drying the produced wood chips with waste heat from the closest biogas plants and sell the dry chips within a transport distance of 20 km to these biogas plants.

Both production pathways result in different commodity prices and distinct costs (see “Annuity calculation” and “Linking annuity calculation with yield and price fluctuations” sections). Contrary to pathway (a), there are two transport distances to consider in pathway (b). The first biomass transport distance from the parcel to the biogas plant was calculated in two steps. First, the Euclidean distance between each parcel and the currently existing closest biogas plant (derived from [52]) was measured. Second, the resulting distance was multiplied with a factor of 1.3 representing the average value of a least-cost analysis from 100 randomly selected arable parcels and their road distances [57] to the closest biogas plant. The second transport distance, as in pathway (a), is a fixed distance of 20 km.

Yield and yield increase

The yield data underlying the scenarios reflect modelling results of average decadal yields (2006–2015) for the annual reference crops (wheat, oilseed rape, barley and maize), whereas the SRC yield data (poplar SRC, 5-year rotation, 7000 saplings) refer to the simulated mean annual increment of woody biomass per rotation period (i.e. four rotation periods for the 20-year-time horizon of the scenarios).

Average annual yields of the annual reference crops were modelled using a multiple linear regression approach which is based on yield levels from field experiments of 52 sites located in Lower Saxony [58]. The model was calibrated with yield data of the Göttingen district and validated with local farm data [26]. The average annual yield increase of the annual reference crops (Table 1) was considered according to updated trend analysis results reported by Busch and Thiele [29]. The results reflect the long-term trends (1976–2015) for the reference crops based on data from national and federal state statistics [59, 60].

Table 1 Reference yield levels as scenario input

The SRC yield model for poplar SRC builds on findings by Petzold et al. [61] and is a combination of statistical and empirical functions which refer to available soil water capacity, water balance and temperature as input parameters. The model was modified [26] and calibrated with data from Thuringian long-term field experiments [62, 63] which show soil characteristics and climatic conditions that are comparable to the Göttingen situation.

Details about the yield modelling approaches and the underlying data can be derived from Busch and Thiele [29]. For the energy supply calculation, SRC yields were transformed to numbers of primary energy content by using a conversion factor of 4.95 MWh per oven dry ton (t od) of biomass yield according to FNR [64].

Annuity calculation

Establishing a SRC plantation is a long-term investment with initial as well as final investments and a “delayed” financial return, beginning with the wood chip sale from the first harvesting operation. This is a major difference to annual cropping systems and needs a suitable economic calculation approach. The gross margin calculation, farmers are used to, is not suitable to cover the different timing of payments and revenues in a perennial system like SRC. Therefore, the dynamic capital budgeting approach has to be applied to compare the profit margins of an annual cropping system with a SRC plantation. Annuities, as the result of this calculation approach, represent the average annual profitability and can thus be used for an economic comparison (e.g. [28, 6567]). The discount rate applied for the annuity calculation was set to 3.5% for annual crops as well as for SRC. Prices and costs used for the annuity calculation are addressed in the two subsequent sections. To determine the profitability of SRC against the three reference crop rotations, annuity differences were calculated as a result of a Monte Carlos simulation (see “Linking annuity calculation with yield and price fluctuations” section) and a stochastic dominance analysis of the SRC annuities (“Selecting economic competitive SRC sites based on the concept of stochastic dominance” section).


Commodity prices were gathered from regional and national statistics [6871]. Prices were calculated as net prices without VAT and adjusted for inflation with 2015 as base year (see Table 2). Price averages of the decade from 2006 to 2015 were used as reference which is a conservative approach since the price relation between crop commodities and wood chips is in favour for crop commodities compared to the 2015 situation. Two wood chips commodity price levels were considered (see Table 2) due to the alternative production pathways described in the “Wood chip production pathways” section. The reduced wood chip prices for fresh wood chips reflect maximum drying losses of 20% derived from [7275].

Table 2 Commodity prices and price changes for the annual reference crops and wood chips as averages for the decade 2006–2015, respectively, for the year 2015 according to national and regional statistics [6871]


Information on crop production costs for the annual reference crops wheat, barley, oilseed rape and maize was derived from annual reports of the Niedersachsen Chamber of Agriculture [70]. Crop production costs were calculated according to KTBL [76] comprising direct costs, and labour and machinery costs.

SRC cost calculation was carried out for five cost positions: (a) site preparation and planting, (b) harvesting operation, (c) transportation in a 20-km radius, (d) storage and drying and (e) re-conversion, by taking their median values from 32 literature sources on German SRC production [28, 6567, 7299]. Costs associated with variable transport distances (0–30 km) as in wood chip production pathway (b) were calculated via a polynomial cost-distance function derived from data of the literature review [28, 6567, 7299].

$$ \mathrm{Transport}\ \mathrm{costs} = -0.0049\times {\mathrm{distance}}^2+0.6929\times \mathrm{distance}+3.1327 $$

Yield-sensitive cost positions were calculated via yield-related linear functions. Costs which are sensitive to parcel size and slope were further addressed by non-linear functions causing increasing costs with diminishing parcel size, respectively, inclining slopes [29, 51].

Table 3 illustrates production costs for average yield levels of the case study region by example of a flat parcel with 5 ha in size.

Table 3 Exemplary production costs for annual reference crops and poplar SRC in the 5-year rotation (7000 cuttings). Costs refer to average yield levels of the case study region (see Table 1)

Linking annuity calculation with yield and price fluctuations

As stated by Kröber et al. [67] and Busch [100], economic return of SRC is most affected by yield and price changes (see Appendix: Tables 5 and 6 for sensitivity analysis examples according to Busch [100]). Given a 10% fluctuation of price and yield levels, Busch and Kröber et al. reported effects on economic return that ranged between 25 and 35% for annual crops and 15 and 30% for SRC. This kind of static sensitivity analyses provided valuable information on sensitive parameters—leading to the incorporation of yield-, price-, and yield-increase-fluctuation over time (20 years) as part of the annuity calculation in this study.

To do so, a Monte Carlo simulation with 10,000 iterations was applied to dynamically calculate yield-, price-, and yield-increase-fluctuation for each of the arable parcels. A Gauss distribution with standard deviations from time series trends (2006–2015 for yields and prices and 1976–2015 for yield increase) of these parameters built the boundary conditions for the simulation. Inter-correlations between the fluctuations of commodity prices, yields and yield increase were considered (Table 4).

Table 4 Input values for the Monte Carlo Simulation of yield-, price-, and yield increase fluctuation. SRC wood chips price (a) relates to SRC production pathway (a) and price (b) to production pathway (b)

The resulting annuity data for each of the reference crops as well as for the SRC provided probability distributions which were used to carry out a stochastic dominance analysis [89, 101] (see next section).

Selecting economic competitive SRC sites based on the concept of stochastic dominance

Different decision-makers have distinct attitudes and preferences towards the risk of economic return. According to Maart‐Noelck and Musshoff [102], the majority of German farmers are risk-averse. Given an economically efficient decision-making process a risk-averse farmer would opt for SRC if the cumulative probability curve of an SRC annuity (“F”) is always below the cumulative probability curve of the corresponding crop rotation annuity (“G”), expressing that the annuity (x) for SRC is higher at any given probability level (see Fig. 3).

Fig. 3
figure 3

The concept of stochastic dominance—illustrating a first-order stochastic dominance of F(x) over G(x)

In the concept of stochastic dominance, this case is called first-order stochastic dominance of the SRC annuity. To apply the concept of stochastic dominance, the annuity results from the Monte Carlo simulation were sorted in ascending order for each crop rotation and for SRC. This procedure was carried out for each of the 19,000 parcels. A stochastic first-order dominant (“D1”) situation was identified on these parcels where all annuity differences were positive when subtracting the sorted SRC annuities from the sorted crop rotation-specific annuities.

Consequently, the averaged annuity differences of the “D1” parcels were used as economic indicator for the indicator evaluation (“Indicator evaluation” section) and is referred to as “D1 SRC annuity difference”.

Potential soil erosion

Potential soil erosion risk was calculated for each agricultural parcel by applying reference methodologies for soil assessments from the federal state agency of Lower Saxony [103]. These methodologies in turn are based on the German adaptation [104] of the „Revised Universal Soil Loss Equation“ [105] taking into account soil texture information from the “Reichsbodenschätzung” (German Soil Survey - 1:5,000) and slope angles from a digital elevation model with a resolution of 12.5m. Details can be derived from Schäfer et al. [106].

Ecotone density

Ecotone density was calculated for agricultural landscapes surrounding each arable parcel in a 250-m radius—with agricultural landscapes defined by agriculture as the dominating land cover (>50% of the area covered in the search radius). Within each radius of the arable parcels, lengths of woody edges were summarized and divided by the area total to get the density measure “ecotone density”. German ATKIS (Official Topographic Information System) data (1:25,000) and its land cover classification [57] in combination with the mapping of “woody structures outside forests” provided by Seidel et al. [107] were the underlying data sources to determine the ecotone density indicator.

Indicator evaluation

The three indicators “annuity difference”, “potential soil erosion” and “ecotone density” were evaluated towards the criteria “competitive economic return”, “prevention from soil erosion” and “structural enrichment” according to the scenario goals. For each criterion, an evaluation function was generated that covers the value range from 0 to 100 (see Figs. 4 and 5).

Fig. 4
figure 4

Indicator evaluation for the multi-criteria analysis—assessing the economic competitiveness of SRC compared to annual reference crop rotation

Fig. 5
figure 5

Indicator evaluation for the multi-criteria analysis—assessing the potentials of SRC for “prevention form soil erosion” (a) and “structural enrichment” (b) compared to annual reference crop rotation. Grey corridors indicate the range of values that were considered for the final score calculation (see “Final score calculation” section)

Based on the “D1 SRC annuity difference”, “competitive economic return” was described via a ramp function with a “D1 SRC annuity difference” of 0€ ha−1 a−1 as minimum and 200€ ha−1 a−1 as maximum of the function (see Fig. 4). A medium competitive economic return was assigned to a “D1 SRC annuity difference” of 100€ since this reflects a risk premium for SRC in comparison to annual crops as reported by Ericson et al. [108]. The “D1 SRC annuity difference” of 200€ ha−1 a−1 was selected as upper threshold because it covers the potential loss of revenue due to low prices combined with low yields from the static sensitivity analysis by Kröber [67] and Busch [100].

Thresholds based on the EU cross-compliance regulations were used [109] to evaluate the SRC potential to provide prevention from soil erosion. According to these regulations, farmers have to take protective measures on arable parcels with a potential soil erosion risk higher than 15 t ha−1 a−1. The minimum (“0”) and maximum values (“100”) of the evaluation function relate to zero, respectively, 25 t ha−1 of “potential soil erosion” (see Fig. 5), and reflect the risk classification of the Federal State Agency for Mining, Geology and Energy of Lower Saxony [104]. Note that for the multi-criteria assessment, only areas with a potential soil erosion risk greater than 15 t ha−1 a−1 were considered to address the cross-compliance regulations (see Fig. 5a also).

Agricultural landscapes with low ecotone densities will profit from the enrichment with woody structures provided by SRC [2426]. Priority areas for structural enrichment as identified by regional planning for the rural district of Göttingen [42] were used as reference to derive the minimum and maximum values for the evaluation function of “ecotone density” (see Fig. 5b). With ecotone density values ranging between 7 and 50 m ha−1 in these priority areas, the evaluation function for SRC was shaped in a way that maximum structural enrichment potential was assigned to a density value lower than 10 m ha−1. The lower threshold was set to an ecotone density of 50 m ha−1. Only ecotone densities lower than 50 m ha−1 were considered for the multi-criteria calculation.

Final score calculation

Two procedures, (a) the weighted average score calculation and (b) the fuzzy weighted maximum calculation, were applied to carry out the multi-criteria analysis. With the weighted average score method, the evaluation values of the three criteria were multiplied with their specific weight and averaged over the value sum by taking the weight sum into account. The ordered weighted fuzzy averaging builds on procedure (a) by multiplying each criterion considered with its specific weight but orders the results and applies an order weight α as exponent [110, 111]. The rationale behind this procedure is to vary the logic when combining the criteria. Low-order weights strongly select the high-ranked values of the input criteria while high-order weights support the low-ranked values. An order weight of 1 simply represents method (a). For this study, low-order weights were applied to pick the maximum criterion values for the selection of suitable parcels.

Applying spatial filter rules

Spatial filter rules provide an additional opportunity to steer the selection of suitable SRC parcels. For this study, five spatial filter rules were applied. Environmental issues are addressed by drawing buffer zones with a diameter of 200 m around humid-sensitive areas [112] and excluding SRC from NATURA 2000 areas (SPA and SAC) [51, 52]. Only arable land was considered for the SRC site selection since the conversion of pasture poses potential environmental concerns [52, 113]. Further, parcel selection was limited to a maximum SRC share of 20% for each municipality and to a maximum parcel size of 10 ha to avoid negative effects on scenic beauty and biodiversity [26].


The results section is subdivided in three parts showing parcel suitability findings on different spatial levels by comparing the two scenarios including their two production pathways. The “Suitable “D1” SRC areas—results for the district level” section covers the aggregated results on the district level, whereas the “Identifying synergies and trade-offs on the municipality level” section addresses the variation of results on the municipality level, and the “Identifying synergies and trade-offs on the parcel level” section focuses on synergies and trade-offs on the parcel level.

Suitable “D1” SRC areas—results for the district level

The district level results are depicted in aggregated form in Fig. 6. The main objective of the figure was to compare the suitable SRC parcels to the reference crop rotations as well as to the combination of all three reference crop rotations with respect to (1) area sum, (2) energy supply, (3) avg. annuity difference, (4) ecotone density and (5) soil erosion. For this purpose, the two scenarios as well as their production pathways were compared to each other. The absolute numbers were presented in spider diagrams, whereas the relative differences between the scenarios, respectively, between the production pathways were highlighted in the vertical and horizontal bar graphs. Note that suitability for both scenarios implies the “D1 annuity difference”.

Fig. 6
figure 6

Comparison of the two scenarios “income first” and “ecological benefits” regarding their main characteristics and under consideration of the two alternative production pathways “fresh—fresh wood chip production” and “dry—drying with waste heat”

Overall analysis

The general picture, valid for both scenarios and their production pathways on the district level, is that SRC was economically most competitive against a “ORWB” crop rotation and least viable against a “MWMW” crop rotation under the given scenario conditions. This results in a significant drop in area extent and energy supply. Additional ecological synergies in the “ecological benefits” scenario came at the price of a substantial decline in suitable SRC areas. Concerning annuity differences, area extent and energy production, the production pathways of the two scenarios showed contrary results. In “income First”, drying was the economically superior production pathway for SRC compared to all crop rotations, and showed a larger area extent as well as a higher energy supply for SRC compared to the “ORWB”, and the “MWMW” crop rotations, and vice versa for the “ecological benefits” scenario.

Regarding the ecological effects, the influence of the production pathway was less important for both scenarios, showing no differences for erosion protection, and comparably small changes for structural enrichment—but with opposite effects on SRC compared to a “MWMW” crop rotation and to all three crop rotations.

Area and energy supply

The extent of suitable “D1” SRC parcels in the study area ranged between a minimum of 668 ha for the “ecological benefits” scenario (compared to all three crop rotations and the fresh wood chip production pathway) and a maximum of 5074 ha for the “income first” scenario (compared to a “ORWB” rotation and fresh wood chip production pathway). This corresponds to a share between 2 and 14% of the arable area outside the priority regions for “WWSB” crop rotations (37,020 ha). Accordingly, the potential energy supply varied between a minimum of 55 and 367 GWh a−1 which is equivalent to 7–46% of the projected renewable energy supply of the moderate scenario in the integrated climate protection plan [41]. The diminished suitable SRC areas under the “ecological benefits” scenario conditions (decline of 40–50% compared to the “income first” scenario) resulted from the strict ecological constraints applied during the multi-criteria assessment (Fig. 6).

Annuity differences

Average annuity differences strongly differed between the crop rotations with a minimum of 42€ ha−1 a−1 for the “MWMW” crop rotation (“fresh”–“ecological benefits”) and 118€ ha–1 a−1 (“dry”–“income first”). Interestingly, when compared to all three crop rotations, the average “D1 SRC annuity difference” was higher than for each single crop rotation in both scenarios and for both pathways. This can be explained by the comparably lower suitable area for the “all three crop rotations” parcel selection that induces a non-intended optimization “D1 SRC annuity differences”. Note that the corresponding area for the fresh wood chip production pathway in the “ecological benefits” scenario is only 668 ha and for the dried wood chips pathway in the “income first” scenario restricted to 1711 ha.

Ecotone density and soil erosion

Due to the thresholds set for the environmental indicators (“Indicator evaluation” section), the “ecological benefits” scenario came with considerably higher positive effects on erosion protection and structural enrichment compared to the “income first” scenario, especially for a potential structural enrichment by SRC. Here, the positive effect was most pronounced in comparison to the “MWMW”, and the “ORWW” crop rotations for the fresh wood chip production pathway. At the same time, the decline in annuity differences compared to the “income first” scenario was comparably small (3–9%). Moreover, in case of the fresh wood chip production pathway and compared to all three crop rotations, the annuity difference even slightly inclined.

Identifying synergies and trade-offs on the municipality level

Entry point for the municipality-level analysis was the selection of the most efficient production pathway for each arable parcel where SRC is economically superior (“D1”) to all three crop rotations. Based on this selection, the focus of the municipality-level analysis was on the comparison of both scenarios regarding (a) the municipal distribution of suitable SRC parcels, (b) the identification of common suitable SRC parcels and (c) the variation in annuity differences and the performance of the two production pathways.

The suitable area for the “income first” scenario comprised a district total of 1793 ha unevenly distributed over the 12 RDG municipalities (Fig. 7a) and with more than 50% of the suitable SRC parcels located in the two municipalities Gleichen (No. 9) and Staufenberg (No. 1). The primary energy supply amounted for around 130 GWh a−1 or 8% of the renewable energy supply in 2030 strived for by local climate protection goals. According to the amount of suitable areas and the SRC productivity, primary energy supply on a municipal level varied between 0.5 and 40 GWh a−1 (Fig. 7b).

Fig. 7
figure 7

Main characteristics of suitable “D1” SRC parcels against all three crop rotation for the “income first” and the “ecological benefits” scenario illustrating the following: a area extent, b annuity differences, c energy supply, d ecotone density, e excellence of production pathways expressed as percentage share of the suitable areas and f potential soil erosion

For the “ecological benefits” scenario, the area of suitable SRC parcels diminished to a district total of 923 ha (Fig. 7a). Note that all these parcels are synonymous to selected parcels of the “income first” scenario implicating a 52% share of parcels with higher ecological synergies. Due to the diminished suitable area of the “ecological benefits” scenario, the total potential primary energy supply declined to 70 GWh a−1 (Fig. 7b).

The municipal distribution pattern of suitable SRC parcels was similar to the “income first” scenario but with some variation, e.g. the Adelebsen (No. 4) municipality having no “ecological benefits” areas, whereas the municipality of Friedland (No. 8) showed a 70% share. Again, the municipal energy supply closely followed the area distribution with a maximum of 24 GWh a−1 in the municipality of Gleichen.

Concerning the wood chip production pathways, it turned out that drying with waste heat from biogas plants (Fig. 7c) was economically beneficial for 1442 ha or 81% of the area addressed by the “income first” scenario, respectively, on 84% or 775 ha of the “ecological benefits” scenario. The “municipal pattern” was quite similar for both scenarios with a variation of shares between 79 and 94% for the “income first” scenario and 74 and 97% for the “ecological benefits” scenario. The exceptional situation for the municipality of Rosdorf (No. 7)—showing fresh wood chip production as the only option, reflected the effects of the spatial selection procedure. Since the arable parcels closer to biogas plants were excluded from the analysis due to very high crop productivity (being economically superior to SRC) in this municipality, only remote parcels were part of the assessment procedure—leading to the sole selection of fresh wood chip production as a feasible pathway.

The boxplot illustration (Fig. 7d) reveals a considerable variation in median annuity differences on the municipality level. For the “income first” scenario, the median annuity difference varied between 77 and 207€ ha−1 a−1 which equals a deviation between −41 and +59% compared to the median annuity difference of 130€ ha−1 a−1 on the district level. The municipal variation of median annuity differences for the “ecological benefits” scenario showed a similar pattern and ranged between 63 and 236€ ha−1 a−1. Despite the similar municipal pattern, the median annuity differences were slightly lower in seven out of 12 municipalities compared to the “income first” scenario—leading to a diminished median annuity difference of 119€ ha−1 a−1 on the district level (Fig. 7d).

In contrast to a slightly diminished economic performance, the suitable areas of the “ecological benefits” scenario came with a considerable increase of ecological opportunities (Fig. 7e, f). Structural enrichment could be addressed effectively in 11 municipalities which was in strong contrast to the “income first” scenario. Here, the boxplots illustrate that in nine municipalities, more than 25% of the suitable SRC area s are located in arable landscapes with higher ecotone densities which could provoke conflicts with nature conservation goals as well as scenic beauty (Fig. 7e). Since soil erosion risk is a widespread phenomenon in the study area, even the suitable SRC parcels of the “income first” scenario provide ample opportunity for erosion protection (Fig. 7f). However, due to the threshold setting as part of the scenario quantification process (“Indicator evaluation” section), only parcels that are very exposed to soil erosion risk and require cross-compliance measures for soil protection were selected in the “ecological benefits” scenario. Figure 7f illustrates this substantially increased level of soil protection on the suitable SRC parcels.

The boxplots (Fig. 7d–f) further indicate that maximum synergies between ecological services and economic return are most likely to expect in the municipalities 1, 3, 5, 9 and 11 due to the combination of comparably high annuity differences for both scenarios and the additional gain for erosion protection and structural enrichment from the “ecological benefits” scenario.

Identifying synergies and trade-offs on the parcel level

Knowing the distribution of suitable areas, their level of annuity differences and the share of parcels where multiple scenario objectives are met is a valuable information provided by the district- and municipality-level analysis. The specific evaluation of synergies and trade-offs, however, has to take place on the parcel level. Thus, leaning on the participatory scenario generation in the study area, a potential stakeholder dialogue between farmers, nature conservationists and regional planners was mimicked to select the most suitable SRC parcels according to the following four objectives: (a) SRC suitability is assessed against all three crop rotations and the most efficient production pathway, (b) parcels with the highest annuity difference from the “income first” scenario are selected, (c) parcels with the highest average score from the “ecological benefits” scenario are selected and (d) parcels with the maximum score of one criterion from the “ecological benefits” scenario are selected.

This way, specifics of a potential win-win situation between economic return and positive ecological effects as well as potential trade-offs can be visualized and discussed. For the cartographic illustration example (Fig. 8), the selected area of the most suitable SRC parcels was restricted to 12 ha each.

Fig. 8
figure 8

Location of the most suitable SRC parcels according to the score calculation for the “income first” scenario and the two alternatives for the “ecological benefits” scenario. The different colours of the database rows illustrate which parcels belong to multiple selections: brown—“income first” only, orange—“income first” and “ecological benefits”, green—both alternatives of the “ecological benefits” selection, blue—only one alternative of the “ecological benefits” scenario. Abbreviations: ED ecotone density, AD annuity difference, W wheat, B barley, OR oilseed rape, M maize

As suggested by Fig. 7 in the previous section, the most suitable parcels are located in the municipality of Dransfeld (No. 3). In total, 23 parcels were identified regarding the four objectives with eight parcels being suitable for more than one objective (see Fig. 8). However, only two parcels of the “income first” selection met all four objectives representing a win-win situation by combining high annuity differences with a great potential of environmental benefits from planting SRC. When aiming at increasing the environmental synergies, the other four parcels of the “income first” selection need to be replaced by the six, respectively, the nine parcels from the “Environmental benefits” selections.

In terms of the average score selection (objective c), this would imply highest benefits for erosion protection and structural enrichment but at the cost of declining annuity differences by 65€ ha−1 a−1.

Choosing the parcels of the maximum-score alternative of the “ecological benefits” scenario (objective d) generated an equal benefit for erosion protection but lower benefits for structural enrichment. However, annuity differences only diminished by 40€ ha−1 a−1 for the six parcels needed to replace the ones from the “income first” scenario.

In terms of energy provision, a replacement of the “income first” parcel selection by the maximum-score selection would diminish the supply by 120 MWh a−1 or 14% which results from the comparable low SRC productivity on four out of seven parcels. Interestingly, the lower SRC productivity of the maximum-score selection did not affect the “D1” characteristics of the annuity differences because maize productivity on these parcels is particularly low too.

Apart from this parcel-to-parcel analysis, the scenario results could be used to analyse the options of ecological services in a landscape context. As one example, suitable SRC sites could provide first step stones to establish networks of woody structures as illustrated by the corridors in Fig. 8. These exemplary corridors in turn could be digitized and used as additional spatial filter rule for a new scenario generation in BEAST or the underlying database could be retrieved, e.g. to find out what payments are needed to compensate farmers on targeted parcels that are economically not competitive to the reference crop rotations.


Scenario generation and quantification

Woody biomass cropping on agricultural land is a complex issue since it tackles various aspects ranging from technical and economic aspects over ecosystem services and nature conservation goals to policy impacts on different spatial and institutional levels. Consequently, a broad group of stakeholders is involved when it comes to local or regional decision-making processes. A participative scenario generation process supported by interactive visualization tools provides an effective methodology to interlink these objectives by facilitating the complex negotiation process between various stakeholder groups and local key players. Applying the scenario generation and quantification approach with the BEAST framework allows to “trace-back the results” and to rapidly modify the scenario setting—starting from the input information over the criteria evaluation to the setting of spatial filter rules and the selection of the multi-criteria evaluation procedure (see Fig. 9). The scenario quantification methodology presented in this contribution reflects the BEAST approach [29, 44, 100] and could be used as a blueprint for other regions independent of the goals or the spatial configuration. This is because the BEAST approach just provides a shell where, e.g. the type of indicators, the reference crops or the spatial filter rules could be exchanged according to the specific targets of the application. Database and geometry export allows for further spreadsheet or GIS analysis. GIS-post-processing results can be imported to BEAST and enhance the analysis options considerably. This way, an iterative scenario development can be supported and different kinds of production or value chains can be analysed. Currently, the International Energy Agency is preparing a report on BEAST to support the application of this methodology in the international context [100].

Fig. 9
figure 9

From goals to implementation—participatory decisions on formal and informal planning objectives [4143] on a local to regional scale—BEAST as a means to support land-use decisions with respect to lignocellulosic crops on agricultural land

Based on the experience of several SRC projects (NOVALIS, Rating-SRC, BEST [23, 24, 29], the presented approach is deemed as a flexible interactive support to facilitate local dialogues as part of a multi-step stakeholder involvement. Beginning with a broader dialogue and participatory scenario generation with tools like BEAST, it is appropriate to proceed in smaller expert groups and to apply more complex (but less transparent) approaches, e.g. to address monitoring and evaluation aspects (Fig. 9), on various spatial and temporal scales. Here, dynamic modelling with cellular automata approaches and multi-objective decision-making (MODM) are effective methods. Existing tools like GISCAME [114] or LUMASS [115] provide possible solutions. For multi-criteria farm-level assessments, a linkage between econometric farm-models like EÖM-Monica as part of the LANDCARE-DSS [116] with scenario and evaluation tools like BEAST or MANUELA [117] and yield-models like BIOSTAR [118] or EÖM-Yieldstat [116] are viable options.

As illustrated by Fig. 9, there are several typical local goals in place, many of them directly or indirectly addressed by woody biomass cropping. The scenario results of this study addressed a couple of these goals by showing the amount of potential biomass supply, identifying parcels with the potential to diversify farmers’ income and illustrating opportunities to generate ecological synergies. The identification of optimal parcel locations for SRC follows the “multi-attribute decision-making” (MADM) methodology [119], and allows to combine multiple goals with multiple criteria. However, it is not possible to address optimal solutions for multiple objectives in a spatial context. This would require mathematical optimization algorithms, e.g. in form of linear programming [120] which in turn makes it much more difficult to understand the relation between scenario settings and optimization results. Again, these aspects should be subject to further, more expert-oriented workshops and adapted model applications.


Annuities were calculated under consideration of price fluctuations but deliberately not with annual price and cost changes since the major focus was on relating the study results with current levels of annuities, respectively, their differences. Moreover, not including annual price and cost changes is considered as a conservative calculation for two major reasons: (a) In the last decade (2006–2015), wood chip prices increased at a higher rate and with lower price fluctuations than annual crop commodities [6871], and (b) given an extension of SRC area, it is likely that future cost increases for SRC will be lower than for annual crops because there is plenty of room for improving efficiency (see Fig. 10), regarding e.g. logistics, availability of machinery or harvesting technology.

Fig. 10
figure 10

Cost variation of SRC cost positions based on a literature review of 32 sources on German SRC plantations [6567, 7299]

Yield calculation

Yield levels as one important input for the economic assessment were simulated as average decadal yields with statistical yield models for the annual reference crops and with a combined empirical-statistical approach for SRC [this study, 26]. Yield fluctuations were stochastically addressed via Monte Carlo simulation runs. This approach was deemed as being best adapted to the goals of the scenario generation process and which were to assess opportunities and constraints of SRC over a 20-year time period with respect to existing local goals. However, for further studies it would be interesting to compare spatial patterns caused by the current modelling approach with results calculated, e.g. with BIOSTAR [118].

Due to the very limited available data on long-term SRC yields, the analysis was restricted to poplar as reference species. Here, the MAX-1 clone in the 5-year rotation was taken as reference because this combination represents a common clone with an economically efficient rotation period.

Risk evaluation via the concept of stochastic dominance

Results of this study indicate that a thorough parcel selection is crucial to gain economic return from SRC which is competitive to common arable crop rotations on a low risk-level. A low risk-level that addresses risk-averse farmers, as the majority of the German farmers [102], was determined as a stochastic first-order dominant positive annuity difference from SRC compared to the annual reference rotations. Wolbert-Haverkamp and Mußhoff [121] introduced the real option approach (ROA) as alternative to the net present value (NPV) calculation as classical investment theory (used in this study). In contrast to the NPV approach, the ROA takes effects like the loss of flexibility or the uncertainty of investment returns into account via stochastic modelling. According to Wolbert-Haverkamp and Mußhoff, German farmers need an additional trigger of 270–342€ ha−1 a−1 to opt for SRC instead of annual cropping. Transferred to this study this would imply that the suitable “D1” SRC parcels have to show an average annuity difference (i.e. the 0.5 percentile of the MC simulation results) that falls in this ROA range. Referring to the 1800 ha which was identified as suitable “D1” SRC areas against all three crop rotations, the average annuity difference is 295€ ha−1 a−1 and ranges between 235 and 348€ ha−1 a−1 on the municipality level. In total, around 75% of the “D1” SRC parcels meet the ROA trigger value range calculated by Wolbert-Haverkamp and Mußhoff.

Apart from a thorough site selection as risk-minimizing strategy, business co-operations in SRC-based supply chains are an option to reduce risks for farmers by sharing knowledge with partners, establishing guaranteed biomass sales or limiting financial risks by sharing initial investments [27]. Especially in regions with comparable small farm sizes—as is the case for the study area—these co-operations are needed to enable joint efforts of many farmers, allowing them to contribute with only a small proportion of their arable land. In addition to private investors institutional support is an urgent need. Starting with a considerable reduction of approval and planning times, institutional actors could actively support SRC value chains by supplying selected public building with wood chips heating.

Farm-level assessments

Although the high spatial resolution allows to analyse the study results on a parcel-scale, it was not possible to carry out farm-level based assessments since information on lease contracts and land tenure were not available. For further studies, a farm-level assessment would allow to compare opportunities and constraints associated with farm-size and farm structure. With the consideration of lease contracts and farm-parcel distances, the current economic calculation could be varied and the effects on suitability scores could be examined.

Ecological synergies and spatial patterns

In this study, two ecological effects were exemplary assessed in combination with an economic evaluation to demonstrate the opportunities and constraints of synergies as a starting point for further elaboration in other studies. To avoid adverse effects between erosion protection and landscape structure, spatial filter rules as well as indicator thresholds were applied. The combination of spatial filter rules and indicator thresholds is a flexible tool-set to steer the spatial allocation of SRC. It is however not possible in the current scenario application with BEAST to combine indicators interactively or to quantify adverse effects between the ecological criteria. This would require a dynamic spatial and temporal assessment which would be available when supplementing BEAST with modelling approaches like GISCAME or LUMASS. In this respect, Frank et al. [114, 122, 123] for example gave interesting illustrations of how to interlink landscape metrics with the ecosystem services approach using GISCAME for the spatial simulation.

Apart from erosion protection and structural enrichment, additional SRC-related ecological effects such as water retention, ground water protection or habitat provision (e.g. [19, 2224, 37, 51] for an overview) should be taken into account. Here, BEAST provides a flexible shell to exchange or add indicators.


Landscape transformation due to the expansion of renewable energies has become an issue during the last two decades and needs local/regional concepts to steer land-use decisions more pro-actively. Participatory scenario generation and visualization of results can help local actors to identify common interests, reduce perception barriers and start off e.g. with co-operations between farmers, local institutions and business partners.

Concerning the stakeholder involvement, a multi-step approach seems to be appropriate to combine formal and informal planning goals as well as add a dynamic (e.g. monitoring) component to existing planning processes. Beginning with a broader dialogue and participatory scenario generation with tools like BEAST, the elaboration of these findings as well as the dynamic spatial-temporal analysis needs more complex modelling approaches and should then be subject to smaller expert groups. Both steps need a small series of workshops and then follow-ups (e.g. biannual) with a targeted and iterating identification of synergies between economic return and ecological services to monitor and evaluate the process.

Short rotation coppice is an economic viable alternative for renewable energy production in the case study region with the strength to provide, respectively, to protect selected ecosystems services which are different to annual crops or which annual crops are lacking. SRC could be particularly valuable when bridging distinct land cover types and mediating between different land-use intensities in agricultural landscape. The suitable areas identified in this study offer a considerable potential to diversify farmers’ income, provide additional renewable energy supply and create ecological synergies. The spatial explicit visualization allows to identify target areas for project or planning purposes with e.g. initializing potential partnerships of farmers to provide suitable parcels for SRC cropping.

However, since at least 80% of the arable parcels in the case study area are not suitable to grow SRC as a low-risk alternative to the reference crop rotations, it is of crucial importance for farmers to thoroughly select the appropriate sites and to consider the production- and marketing options. Concerning local production and marketing options, it needs a joint effort of local actors to initiate demonstration projects illustrating if and how regional supply chains could work out.

Farmers need reliable mid-term strategic partnerships to opt for SRC because they face a loss of flexibility by planting perennial crops, they have to cope with high initial investment costs and a delay of several years before the SRC system creates an economic return. Thus, contracting with annual payment schemes to bridge the income gap and/or support for initial investments needs to be a part of local implementation strategies. On the district level, in turn, these co-operations could help to interlink regional development schemes with spatial planning and climate protection goals. A first opportunity for the case study region is the further application of BEAST within the regional LEADER process in the next 2 years.


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Parts of the work presented in this study were funded by the German Federal Ministry of Education and Research (BMBF), grant number 033L033A, and were developed within the BEST-Research Framework ( I gratefully acknowledge this support.

The work of three anonymous reviewers helped to improve the manuscript and is very much appreciated.

Author’s information

GB (BALSA) is a geographer and has been working in national and international research projects since 1995. As a senior scientific research consultant and project manager, he is an expert in landscape ecology, GIS modelling and scenario -based decision support. In 2003, GB founded the Bureau for Applied Landscape Ecology and Scenario Analysis (BALSA). A focus of BALSA is on GIS modelling, land-use change assessment and on scenario development. For the last 10 years, landscape-related ecological evaluation of short rotation coppice and supporting participatory decision processes have been major topics of BALSA within multi-disciplinary research projects. GB is an external lecturer at the Georg-August-University Göttingen and associated member of the International Energy Agency (Task43).

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To illustrate the impact of specific cost positions on the annual economic return (annuities), a set of eight variables for SRC (Table 5 in Appendix) and a set of seven variables for annual crops (Table 6 in Appendix) were varied. For SRC, “preparation and planting”, “harvesting and chipping”, “re-conversion”, “transportation”, “yield-level” and “price-level” were altered by 10% in relation to the 2015 reference values (see Table 5 in Appendix). SRC annuities were calculated for two production pathways: (a) fresh wood chip production and sale within a 20-km radius with a price of 93€ t od −1, reflecting the lower price paid for fresh material delivery [98] and (b) dried wood chip production and sale within a 20-km radius with a price of 116€ t od −1 (2006–2015 average). The transportation to the closest biogas plant was calculated for a transport distance of 5 km.

Table 5 Impact of cost variations on SRC annuities from SRC production with (a) no drying but reduced commodity prices of 93€ t od (80%—according to [98]), (b) drying with waste energy from biogas plants—10% biomass loss according to [70]

The cost-impact on annuities of diminishing “field size” was exemplary calculated for a 1-ha field and compared to the reference size of 5 ha. The impact of “slope” on costs was derived by increasing the field slope from 0% (reference) to 10%.

Table 6 Impact of cost variations on annuities from annual crop production with reference yield levels for wheat 81.2 dt ha−1 a−1, oilseed rape 39.4 dt ha−1 a−1, barley 76.4 dt ha−1 a−1, sugar beet 699 dt ha−1 a−1, maize 162.5 dt (33% dm) ha−1 a−1

Sensitivity analysis for annual crops was carried out in the same way as described for SRC. Additionally, yield incline due to breeding progress was included with an annual increase that reflects the long-term trend of each crop see Table 4 in the manuscript. Table 6 in Appendix indicates the dominating effect of yield increase followed by price and yield changes.

As stated for SRC, the changes in prices and yields have a substantial impact on economic return of annual crops. The relative impact is even more pronounced for annual crops.

The interest rate for the annuity calculation was set to 3.5% a−1 for the annual reference crops as well as for SRC.

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Busch, G. A spatial explicit scenario method to support participative regional land-use decisions regarding economic and ecological options of short rotation coppice (SRC) for renewable energy production on arable land: case study application for the Göttingen district, Germany. Energ Sustain Soc 7, 2 (2017).

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