Earth & Environmental Sciences
afforestation
25%
agricultural ecosystem
23%
agricultural soil
17%
agriculture
28%
bioenergy
63%
bioenergy production
20%
biofuel
23%
biomass
30%
carbon
17%
carbon balance
17%
carbon sequestration
13%
climate
14%
crop
50%
crop rotation
12%
cropping practice
37%
debt
18%
desert
12%
ecosystem
36%
eddy covariance
37%
effect
13%
ethanol
17%
fertilizer
13%
grass
19%
grassland
46%
greenhouse gas
27%
greenhouse gas emissions
17%
history
17%
land
22%
land use
29%
maize
74%
mariculture
20%
microbial community
13%
mitigation
13%
monoculture
12%
nitrate
23%
nitric oxide
17%
nitrogen
26%
nitrous oxide
100%
polyculture
16%
prairie
43%
program
23%
recirculating system
13%
sedimentation basin
17%
shrubland
27%
soil
56%
soil emission
38%
soybean
38%
transport vehicle
21%
water use efficiency
18%
wheat
23%
Agriculture & Biology
afforestation
28%
agricultural soils
8%
agroecosystems
7%
basins
22%
bioenergy
16%
Bromus inermis
8%
carbon
8%
carbon dioxide
18%
carbon sequestration
8%
coniferous forests
10%
Conservation Reserve Program
29%
corn
14%
Corn Belt region
10%
cropland
10%
cropping systems
16%
deserts
8%
drought
7%
ecosystems
29%
eddy covariance
17%
energy crops
10%
feedstocks
8%
fluidized beds
9%
grasslands
24%
greenhouse gases
8%
Israel
8%
land use
17%
land use change
13%
mariculture
10%
marine fish
7%
methane
8%
microbial communities
14%
Midwestern United States
9%
mineralization
9%
nitrates
19%
nitrites
8%
nitrogen
14%
nitrogen cycle
9%
nitrous oxide
64%
nitrous oxide production
39%
nutrient use efficiency
9%
Panicum virgatum
14%
Phoenix dactylifera
8%
Populus
10%
prairies
13%
recirculating aquaculture systems
18%
Salsola
10%
shrublands
26%
soil
34%
water
8%
water use efficiency
10%
Medicine & Life Sciences
Agriculture
12%
Ammonium Compounds
5%
Aquaculture
9%
Bacterial Structures
18%
Biodiversity
5%
Biofuels
19%
Biomass
26%
Carbon
23%
Carbon Sequestration
9%
Climate
18%
Crop Production
5%
Cucumis sativus
8%
Denaturing Gradient Gel Electrophoresis
6%
Digestion
7%
Ecosystem
24%
Electricity
9%
Ethanol
10%
Fertilizers
10%
Food
6%
Forests
29%
Fossil Fuels
7%
Gases
6%
Grassland
39%
Greenhouse Gases
32%
Light
10%
Medicago sativa
8%
Microbiota
15%
Midwestern United States
24%
Nitrates
18%
Nitric Oxide
5%
Nitrites
7%
Nitrogen
20%
Nitrous Oxide
28%
Nutrients
6%
Panicum
14%
Poaceae
5%
Soil
48%
Soybeans
16%
Sulfides
9%
Temperature
8%
Tetracycline Resistance
9%
Triticum
8%
Water
9%
Zea mays
33%