Agriculture & Biology
willows
88%
shrubs
40%
silvopastoral systems
35%
biomass production
34%
Midwestern United States
34%
hybrid poplars
34%
Salix
34%
snow
31%
perennial grasses
30%
ethanol
27%
woodlands
26%
crop production
24%
grazing
21%
livestock
21%
chemical composition
21%
forage
19%
biomass
19%
grasses
19%
bioenergy
18%
energy
15%
grazing systems
13%
energy content
12%
Populus nigra
11%
growing season
11%
ash content
10%
hemicellulose
9%
forage production
9%
pastures
8%
forage quality
8%
lignin
8%
cellulose
7%
Populus maximowiczii
6%
windbreaks
6%
planting
6%
potential energy
6%
clones
5%
slash
5%
Populus deltoides
5%
woodlots
5%
dates (fruit)
5%
forbs
5%
fossil fuels
5%
Earth & Environmental Sciences
shrub
45%
snow
41%
marginal land
36%
ethanol
34%
biomass
32%
forage
28%
crop production
28%
harvest
25%
woodland
24%
livestock
24%
coppice
23%
grazing
22%
chemical composition
22%
grass
22%
energy
15%
cultivar
12%
comparison
10%
timber
10%
pasture
10%
blowing snow
9%
growing season
9%
lignin
8%
cellulose
8%
ash
6%
crop
6%
seeding
5%
creek
5%
clone
5%
production system
5%
cattle
5%
land management
5%