Agriculture & Biology
winter annuals
100%
Vicia
89%
cover crops
81%
Vicia villosa
79%
nitrogen fixation
75%
cropping systems
69%
legumes
60%
ecotypes
47%
rye
44%
Trifolium pratense
34%
Rhizobium
29%
nitrogen
25%
springs (parts and components)
23%
sweetcorn
18%
cash crops
18%
cold zones
18%
Secale cereale
17%
fallow
15%
nodulation
15%
aboveground biomass
15%
soil quality
13%
tissues
13%
biomass production
12%
Zea mays
12%
weeds
11%
growing season
11%
climate
11%
viability
11%
winter
9%
biomass
9%
Earth & Environmental Sciences
cover crop
98%
nitrogen fixation
89%
cropping practice
73%
ecotype
73%
fixation
72%
productivity
50%
rhizobacterium
49%
winter
44%
cereal
40%
nodulation
30%
tissue
26%
cash crop
26%
cold
26%
biomass
22%
monoculture
22%
nitrogen
22%
fallow
21%
soil nitrogen
21%
weed
20%
inoculation
20%
aboveground biomass
19%
soil quality
19%
fertility
19%
viability
17%
growing season
16%
maize
16%
effect
4%