Agriculture & Biology
cover crops
82%
cropping systems
71%
corn
46%
fallow
39%
rye
37%
biomass
28%
soil penetration resistance
27%
oats
26%
weeds
22%
growing season
22%
Brassica
20%
Brassica napus var. pabularia
19%
arid zones
19%
winter wheat
17%
soil water
15%
grain yield
14%
corn soils
13%
agronomists
13%
volumetric water content
12%
grass weeds
12%
resistance to penetration
11%
turnips
11%
water
11%
crop management
10%
soil depth
10%
aboveground biomass
9%
soil water content
9%
weed control
8%
biomass production
8%
legumes
7%
nitrogen
5%
Earth & Environmental Sciences
cover crop
100%
cropping practice
74%
maize
66%
fallow
43%
weed
42%
cereal
40%
soil water
30%
biomass
28%
growing season
25%
penetration
23%
semiarid region
19%
water use
17%
wheat
17%
water content
14%
underwater environment
13%
soil
11%
winter
11%
soil nitrogen
10%
aboveground biomass
10%
soil depth
9%
harvest
8%
grass
8%
crop
6%
water
5%