Earth & Environmental Sciences
aboveground production
18%
barley
12%
biological nitrogen fixation
17%
carbon footprint
64%
cover crop
14%
crop
7%
crop yield
11%
cropping practice
10%
fertilizer
47%
fertilizer application
12%
field experiment
9%
forage
59%
global warming
9%
grass
47%
grassland
9%
incorporation
18%
intercropping
81%
life cycle
17%
mineral
12%
nitrogen
32%
nitrous oxide
22%
pasture
10%
productivity
38%
rate
7%
sward
31%
wheat
20%
winter
6%
Engineering & Materials Science
Carbon footprint
68%
Crops
36%
Experiments
3%
Fertilizers
70%
Global warming
12%
Life cycle
18%
Minerals
22%
Nitrogen
10%
Nitrogen fertilizers
100%
Nitrogen fixation
21%
Oxides
18%
Productivity
43%
Chemical Compounds
Application
6%
Biological Nitrogen Fixation
18%
Carbon Atom
25%
Fertilizer
67%
Mineral
17%
Nitrogen
6%
Nitrogen Fertilizer
94%
Purity
27%
Reaction Yield
8%
Red
22%
Reduction
5%