Earth & Environmental Sciences
soil organic matter
68%
grassland
59%
agriculture
51%
timescale
51%
organic carbon
41%
turnover
32%
soil
30%
carbon
30%
chronosequence
21%
carbon sink
20%
prairie
19%
agricultural soil
18%
vegetation type
17%
rate
17%
soil property
15%
grass
15%
plain
13%
measuring
12%
vegetation
10%
product
8%
material
7%
method
3%
Agriculture & Biology
grassland soils
100%
soil organic matter
67%
agriculture
53%
carbon sinks
43%
soil organic carbon
40%
labile carbon
27%
chronosequences
24%
Midwestern United States
23%
carbon
23%
agricultural soils
20%
vegetation types
19%
prairies
19%
soil properties
17%
grasslands
15%
vegetation
13%
grasses
13%
soil
9%
methodology
4%