Earth & Environmental Sciences
long-term experiment
88%
grassland soil
87%
carbon dioxide
54%
soil
29%
species richness
21%
ammonium
20%
nitrate
18%
plant species
16%
effect
16%
monoculture
15%
ecosystem function
12%
atmospheric carbon dioxide
7%
soil nitrogen
7%
plant community
5%
nitrification
5%
environmental change
5%
grassland
5%
forecasting
4%
mineralization
4%
forecast
4%
productivity
4%
nitrogen
3%
carbon
3%
experiment
2%
Agriculture & Biology
grassland soils
96%
long term experiments
85%
species diversity
53%
carbon dioxide
53%
soil
34%
ammonium
21%
species richness
19%
nitrates
19%
ecological function
13%
nitrification
6%
global change
6%
nitrogen
6%
mineralization
5%
plant communities
5%
grasslands
4%
carbon
3%
Medicine & Life Sciences
Grassland
100%
Soil
74%
Fertilization
74%
Carbon Dioxide
72%
ammonium nitrate
20%
Ammonium Compounds
14%
Ecosystem
12%
Nitrates
12%
Nitrogen
11%
Nitrification
10%
Carbon
5%
Chemical Compounds
Soil
58%
Nitrate
17%
Ecosystem
13%
Chemical Transformation
10%
Nitrogen
6%
Time
4%
Carbon Atom
2%