Agriculture & Biology
cropland
69%
greenhouse gases
67%
greenhouse gas emissions
42%
greenhouses
40%
methane
36%
soil organic carbon
32%
surge irrigation
29%
rice
25%
carbon sequestration
22%
straw
17%
grain yield
15%
silt loam soils
12%
alkaline soils
12%
nitrous oxide
10%
meta-analysis
10%
organic fertilizers
10%
no-tillage
9%
food security
9%
paddies
9%
soil pH
9%
cropping systems
9%
highlands
8%
climate
7%
carbon dioxide
7%
environmental factors
6%
nitrogen
5%
Earth & Environmental Sciences
cropland management
100%
management practice
51%
greenhouse gas
42%
rice
35%
budget
34%
greenhouse gas emissions
28%
organic carbon
18%
soil
17%
straw
16%
carbon sequestration
15%
irrigation
12%
zero tillage
10%
organic fertiliser
10%
loam
9%
meta-analysis
9%
food security
8%
cropping practice
8%
rate
7%
silt
7%
environmental conditions
6%
mitigation
6%
nitrogen
4%
climate
4%
effect
1%
Chemical Compounds
Greenhouse Gas
63%
Soil
34%
Organic Carbon
26%
Irrigation
24%
Reaction Yield
23%
Organic Fertilizer
14%
Error
6%
Food
5%
Nitrogen
4%
Reduction
3%
pH Value
3%
Application
2%