Agriculture & Biology
inorganic carbon
100%
carbon sinks
91%
topsoil
83%
grasslands
66%
China
48%
soil
38%
carbonates
19%
regional surveys
13%
vegetation
12%
soil surveys
12%
soil acidification
11%
soil separates
11%
soil carbon
10%
confidence interval
9%
global warming
8%
soil organic matter
7%
climate change
7%
deterioration
6%
climate
6%
carbon dioxide
6%
sampling
3%
Earth & Environmental Sciences
inorganic carbon
88%
carbon stock
81%
topsoil
73%
grassland
62%
soil
32%
atmosphere
14%
climate feedback
11%
carbonate
11%
soil acidification
10%
soil survey
10%
vegetation
10%
soil carbon
8%
confidence interval
8%
soil layer
8%
carbon sequestration
7%
carbon dioxide
6%
warming
6%
organic matter
5%
climate change
4%
sampling
4%
climate
4%
loss
4%
rate
2%
Chemical Compounds
Soil
64%
Carbon Atom
35%
Soil Acidification
13%
Carbonate
9%
Organic Matter
6%
Sampling
5%
Carbon Dioxide
4%
Strength
4%
Time
2%