Agriculture & Biology
warm season
84%
cover crops
79%
organic production
74%
mineralization
71%
farming systems
59%
nitrogen
41%
carbon nitrogen ratio
32%
soil water
17%
environmental stewardship
17%
chemical composition
15%
Sorghum bicolor subsp. drummondii
14%
ion exchange resins
13%
degradation
12%
topsoil
11%
agroecosystems
11%
membrane potential
10%
microbial communities
9%
nitrates
8%
legumes
8%
autumn
8%
grasses
7%
carbon
6%
environmental factors
6%
methodology
2%
Earth & Environmental Sciences
organic farming
100%
cover crop
96%
farming system
77%
nitrogen
43%
biochemical composition
29%
soil moisture
16%
decomposition
14%
sorghum
13%
agricultural ecosystem
11%
immobilization
10%
ion exchange
9%
management practice
9%
grass
8%
microbial community
8%
environmental conditions
8%
nitrate
7%
membrane
7%
carbon
5%
loss
5%
soil
4%
method
2%