Agriculture & Biology
carbon sinks
100%
soil organic carbon
94%
China
53%
topsoil
40%
soil
37%
carbon sequestration
26%
soil surveys
13%
sampling
11%
paddies
9%
cropland
5%
greenhouse gas emissions
5%
uncertainty
4%
clay
4%
statistical analysis
3%
spatial distribution
3%
grain yield
3%
carbon
3%
methodology
1%
Earth & Environmental Sciences
carbon stock
89%
organic carbon
64%
province
52%
soil
35%
topsoil
18%
carbon sequestration
11%
geological survey
7%
soil survey
5%
sampling
5%
carbon storage
5%
municipality
4%
mitigation
3%
paddy field
2%
agricultural production
2%
greenhouse gas emissions
2%
statistical analysis
2%
spatial distribution
1%
clay
1%
methodology
1%
carbon
1%
trend
1%
rate
0%
method
0%
Chemical Compounds
Organic Carbon
90%
Soil
70%
Sampling
7%
Time
1%
Carbon Atom
1%
Reaction Yield
0%