Earth & Environmental Sciences
alfalfa
85%
snowmelt
73%
cropping practice
68%
soybean
64%
organic carbon
53%
maize
52%
loss
36%
runoff
34%
biochemical oxygen demand
21%
oxygen
19%
chemical oxygen demand
18%
effect
16%
watershed
14%
crop
14%
prairie
10%
gasification
10%
chemical analysis
9%
sampler
9%
stem
8%
material
7%
protein
7%
water quality
6%
demand
6%
water
5%
carbon
5%
trend
4%
energy
4%
Agriculture & Biology
snowmelt
100%
organic carbon
74%
cropping systems
65%
alfalfa
44%
runoff
39%
total solids
30%
soybeans
30%
corn
25%
biochemical oxygen demand
17%
chemical oxygen demand
17%
oxygen
14%
hydraulic flumes
9%
gasification
9%
Midwestern United States
9%
cropping sequence
8%
samplers
8%
prairies
7%
Medicago sativa
7%
chemical analysis
6%
water quality
6%
Glycine max
6%
Zea mays
5%
water
5%
sampling
4%
carbon
4%
stems
4%
energy
4%
crops
3%
leaves
3%