Agriculture & Biology
agricultural soils
7%
ammonia
61%
ammonium
12%
Archaea
42%
bacteria
25%
biochemistry
6%
ecological differentiation
87%
ecology
4%
energy
3%
environmental factors
4%
fertilization (reproduction)
5%
fertilizers
15%
food production
6%
methodology
1%
nitrates
5%
nitrites
13%
nitrogen cycle
8%
nitrous oxide production
100%
oxidants
72%
oxidation
9%
physiology
5%
slow-release fertilizers
8%
soil pH
6%
urea
5%
Earth & Environmental Sciences
agricultural practice
7%
agricultural soil
6%
ammonia
58%
ammonium
11%
bacterium
29%
biochemistry
7%
ecology
5%
energy
3%
environmental conditions
5%
fertilizer
23%
food production
7%
method
1%
mitigation
57%
natural environment
6%
niche
70%
nitrate
4%
nitrite
12%
nitrogen cycle
8%
nitrous oxide
76%
oxidation
8%
physiology
6%
rate
4%
soil
2%
terrestrial environment
7%
urea
6%
Chemical Compounds
Ammonia
56%
Ammonium
23%
Application
4%
Biochemistry
13%
Ecology
19%
Energy
6%
Environment
16%
Fertilizer
72%
Food
10%
Metabolic
12%
Nitrate
11%
Nitrite
28%
Nitrogen Cycle
24%
Oxidation Reaction
13%
pH Value
6%
Reaction Yield
5%
Soil
24%
Urea
11%