Earth & Environmental Sciences
agricultural land
10%
agricultural soil
13%
background level
14%
bulk density
12%
city
7%
contamination
8%
denitrification
11%
desert
33%
desert soil
18%
distribution
4%
ecosystem
7%
effect
3%
groundwater
7%
human activity
10%
immobilization
13%
incubation
11%
inhabitant
12%
inorganic nitrogen
92%
laboratory
7%
land use
17%
mineralization
9%
nitrate
9%
nitrogen
7%
organic matter
8%
plant resource
18%
soil
33%
soil property
11%
soil water
10%
terrestrial ecosystem
13%
urban ecosystem
100%
urbanization
21%
water content
10%
Agriculture & Biology
agricultural land
15%
agricultural soils
17%
anthropogenic activities
16%
bulk density
15%
denitrification
19%
desert soils
23%
deserts
45%
ecosystems
59%
farming systems
13%
groundwater contamination
21%
land use
30%
mineralization
15%
nitrates
13%
nitrogen
46%
nitrogen cycle
21%
sampling
5%
soil
40%
soil organic matter
14%
soil properties
15%
soil water content
16%
terrestrial ecosystems
19%
urban soils
25%
urbanization
36%
Chemical Compounds
Bulk Density
10%
Denitrification
11%
Ecosystem
95%
Groundwater
9%
Nitrate
6%
Nitrogen
47%
Organic Matter
9%
Soil
67%
Surface
2%