Earth & Environmental Sciences
nitrous oxide
100%
maize
78%
bioenergy
63%
soil
57%
crop
52%
grassland
52%
prairie
43%
soybean
42%
soil emission
38%
cropping practice
37%
eddy covariance
37%
ecosystem
36%
biomass
31%
bioenergy production
30%
land use
29%
agriculture
28%
debt
28%
greenhouse gas
28%
shrubland
27%
program
27%
nitrogen
26%
afforestation
25%
biofuel
24%
land
23%
agricultural ecosystem
23%
nitrate
23%
wheat
23%
transport vehicle
21%
carbon
21%
mariculture
20%
grass
20%
water use efficiency
18%
greenhouse gas emissions
17%
agricultural soil
17%
sedimentation basin
17%
ethanol
17%
nitric oxide
17%
history
17%
carbon balance
17%
carbon sequestration
16%
polyculture
16%
climate
14%
fertilizer
13%
mitigation
13%
microbial community
13%
biofuel production
13%
recirculating system
13%
effect
13%
crop rotation
12%
desert
12%
Agriculture & Biology
nitrous oxide
64%
nitrous oxide production
39%
soil
34%
ecosystems
29%
Conservation Reserve Program
29%
afforestation
28%
shrublands
26%
grasslands
24%
basins
22%
nitrates
19%
recirculating aquaculture systems
18%
carbon dioxide
18%
eddy covariance
17%
land use
17%
bioenergy
16%
cropping systems
16%
microbial communities
14%
Panicum virgatum
14%
nitrogen
14%
corn
14%
land use change
13%
prairies
13%
Salsola
10%
water use efficiency
10%
coniferous forests
10%
mariculture
10%
cropland
10%
energy crops
10%
Corn Belt region
10%
Populus
10%
nutrient use efficiency
9%
fluidized beds
9%
mineralization
9%
nitrogen cycle
9%
Midwestern United States
9%
Bromus inermis
8%
Israel
8%
methane
8%
Phoenix dactylifera
8%
deserts
8%
feedstocks
8%
greenhouse gases
8%
carbon
8%
water
8%
nitrites
8%
carbon sequestration
8%
agricultural soils
8%
drought
7%
marine fish
7%
agroecosystems
7%