Agriculture & Biology
nitrous oxide production
100%
arable soils
85%
nitrous oxide
84%
tillage
70%
reduced tillage
35%
nitrogen fertilizers
33%
emissions factor
25%
soil
18%
crop yield
16%
regression analysis
15%
soil water
15%
grain yield
14%
organic nitrogen
11%
spring barley
11%
grain quality
10%
conventional tillage
10%
organic carbon
9%
nitrogen content
8%
fertilizer application
8%
Quercus
8%
nitrates
7%
Earth & Environmental Sciences
tillage
77%
nitrous oxide
76%
fertilizer
47%
emission factor
39%
soil
31%
soil moisture
30%
fertilizer application
21%
barley
21%
flux measurement
21%
sandy loam
20%
organic nitrogen
20%
cereal
20%
crop yield
19%
research center
19%
oak
18%
multiple regression
18%
effect
17%
regression analysis
16%
organic carbon
14%
nitrate
13%
nitrogen
11%
rate
6%