Earth & Environmental Sciences
pollution
66%
nitrogen
60%
river
49%
nitrate
45%
modeling
42%
leaching
38%
river basin
29%
agricultural land
20%
basin
18%
direct discharger
18%
runoff
17%
dissolved inorganic nitrogen
15%
nitrogen fixation
15%
population distribution
15%
nitrogen cycle
15%
river channel
13%
routing
13%
anthropogenic source
13%
atmospheric deposition
13%
surplus
13%
arid region
13%
immobilization
12%
census
12%
soil layer
12%
population density
11%
nitrification
11%
denitrification
11%
fertilizer
10%
grassland
10%
land cover
10%
spatial resolution
9%
mineralization
9%
agriculture
9%
distribution
9%
nutrient
8%
vegetation
7%
world
7%
land
7%
analysis
3%
Engineering & Materials Science
Rivers
100%
Pollution
93%
Nitrogen
93%
Nitrates
63%
Leaching
48%
Runoff
29%
Nitrogen fixation
19%
Nitrification
16%
Arid regions
16%
Population distribution
15%
Denitrification
14%
Fertilizers
12%
Nutrients
12%
Population Density
12%
Agriculture
11%
Soils
7%
Uncertainty
6%
Chemical Compounds
Nitrogen
60%
Nitrate
42%
Leaching
40%
Nitrogen Cycle
18%
Nitrification
17%
Nitrogen Fixation
15%
Denitrification
14%
Fertilizer
13%
Nutrient
11%
Soil
9%
Amount
4%
Time
4%