Earth & Environmental Sciences
steppe
67%
nitrification
59%
turnover
59%
carbon
36%
ecosystem
16%
nitrate
13%
nitrifying bacterium
11%
terrestrial ecosystem
9%
plant species
8%
soil
7%
ammonium
7%
experiment
7%
human activity
7%
biodiversity
6%
decomposition
6%
bacterium
5%
vegetation
5%
nitrogen
5%
mineral
5%
rate
3%
effect
2%
Agriculture & Biology
nitrification
77%
steppes
74%
carbon
42%
ecosystems
21%
nitrates
15%
nitrifying bacteria
14%
terrestrial ecosystems
11%
soil
9%
ammonium
8%
biodiversity
7%
minerals
6%
vegetation
6%
degradation
5%
nitrogen
5%
bacteria
5%
Chemical Compounds
Nitrification
100%
Ecosystem
52%
Carbon Atom
30%
Soil
18%
Nitrate
16%
Mineral
8%
Ammonium
8%
Compound Mobility
8%
Decomposition
6%
Chemical Transformation
6%
Nitrogen
6%
Amount
4%