Agriculture & Biology
carbon sinks
99%
agricultural soils
92%
arable soils
79%
land management
69%
gases
62%
surpluses
60%
carbon
53%
carbon dioxide
42%
no-tillage
41%
animal manures
39%
sewage sludge
33%
nitrous oxide
31%
woodlands
27%
agricultural land
26%
methane
26%
intensive cropping
20%
protocols
19%
animal manure management
18%
alternative fuels
17%
agricultural management
17%
greenhouse gases
16%
fossil fuels
15%
bioenergy
15%
agroecosystems
14%
European Union
14%
forestry
14%
crop production
12%
straw
12%
agriculture
10%
ecology
10%
grasses
10%
oxidation
10%
Earth & Environmental Sciences
soil gas
100%
carbon sink
94%
trace gas
88%
agricultural soil
84%
mitigation
63%
carbon
46%
arable land
41%
surplus
31%
land management
29%
manure
28%
Kyoto Protocol
18%
crop production
16%
emission reduction
14%
woodland
14%
sewage sludge
14%
regeneration
12%
agricultural land
11%
methane
11%
bioenergy production
10%
agricultural management
9%
agricultural ecosystem
8%
bioenergy
8%
cereal
8%
nitrous oxide
7%
straw
7%
carbon emission
7%
European Union
7%
forestry
6%
fossil fuel
6%
substitution
6%
greenhouse gas
6%
grass
6%
ecology
5%
agriculture
5%
Europe
5%
oxidation
4%
atmosphere
4%
removal
3%
effect
1%