A spatially explicit approach to modeling biological productivity and economic attractiveness of short-rotation woody crops in the eastern USA

Table 1 Fertility rating, fertilizer response, minimum and maximum available soil water in terms of eight soil texture and site position combinations

Soil texture	Site position	Fertility^a rating	Fertilizer^b response	Minimum^c available soil water	Maximum^c available soil water
Sand	Upland	0.15	0.60	50	100
Sand	Lowland	0.30	0.45	50	100
Sandy loam	Upland	0.30	0.50	100	150
Sandy loam	Lowland	0.50	0.30	100	150
Clay loam	Upland	0.55	0.25	150	200
Clay loam	Lowland	0.70	0.10	150	200
Clay	Upland	0.65	0.15	200	250
Clay	Lowland	0.75	0.05	200	250

^aIndex of inherent soil fertility; 1 = high fertility, 0 = low fertility
^bIndex of responsiveness to added nutrients that depends on ability to add leaf area
^cAvailable soil water in mm H₂0 m⁻¹ soil depth

ISSN: 2192-0567