Sustainable forest biomass: a review of current residue harvesting guidelines

Table 6 Physical indicators of sites sensitive to forest biomass harvesting

Jurisdiction		Slope (% gradient)^b	Soil texture	Soil depth (cm)
Code^a	Name	Slope (% gradient)^b	Soil texture	Soil depth (cm)
NB	New Brunswick		R	< 30
AL	Alabama		S
IN	Indiana	> 20%
MA	Massachusetts	> 30%	S	< 51
MD	Maryland	> 20%, > 40%	S	< 51
ME	Maine		CoS	< 30
MN	Minnesota	> 35%	S	< 51
MO	Missouri	> 35%		< 51
MS	Mississippi	> 35%	S (> 60%)	< 60 (A hrzn < 8)
PA	Pennsylvania	> 40%
SC	South Carolina	> 30%	S (> 80%); R	< 50
VT	Vermont	> 20%
WI	Wisconsin		S	< 51
NE-USA	Northeast USA		S
PNW-USA^c	Pacific Northwest USA	Steep
UK	UK		S, skeletal	< 35–45
FR	France		S-LS, SL
NL	Netherlands		S
DK	Denmark		S
FI	Finland		R
LT^d	Lithuania	> 100%

^aJurisdictions in same order as in Additional file 1: Table ST-1
^bSlopes typically reported as gradient (i.e. x/y, or rise-over-run, expressed as x as a percentage of y); no gradient given for PNW-USA (Pacific Northwest USA)
S sand, CoS coarse sand, R rocky or stony, LS loamy sand, SL sandy loam
IN (Indiana) inferred from associated document
^cPNW-USA (Pacific Northwest USA): retain >30% of harvest residue on slopes suitable for ground-based harvesting; retain >50% on steeper slopes in the Douglas-fir region
^dClearcutting not permitted in LT (Lithuania) on slopes > 45° (= 100% slope)

ISSN: 2192-0567