Agriculture & Biology
upland soils
100%
primary forests
86%
secondary forests
80%
microbial biomass
73%
soil fertility
61%
pastures
53%
minerals
50%
Citrus
41%
nitrogen
38%
plantations
37%
Hevea
31%
forest land
29%
Urochloa brizantha
29%
Hevea brasiliensis
27%
tropical rain forests
26%
Citrus sinensis
25%
Amazonia
24%
soil depth
24%
carbon nitrogen ratio
23%
microbial activity
23%
soil
22%
recycling
21%
soil organic matter
21%
ammonium
20%
rubber
20%
nutrient content
19%
vegetation
16%
phosphorus
16%
carbon
14%
Brazil
14%
nutrients
13%
Earth & Environmental Sciences
primary forest
85%
secondary forest
79%
soil fertility
71%
pasture
64%
rubber
45%
biomass
40%
plantation
40%
Nitosol
40%
nitrogen
39%
Acrisol
34%
Ferralsol
34%
soil
28%
nutrient content
26%
land
24%
rainforest
23%
soil depth
23%
microbial activity
21%
ammonium
18%
replacement
18%
recycling
17%
phosphorus
16%
organic matter
14%
nutrient
14%
vegetation
13%
world
12%
carbon
12%