Agriculture & Biology
temperate forests
100%
soil depth
92%
coniferous forests
91%
Quercus
78%
degradation
52%
Quercus serrata
32%
Pinus densiflora
29%
carbon nitrogen ratio
22%
Pinus
18%
microbial biomass
15%
deterioration
11%
enzyme activity
9%
carbon
9%
soil enzymes
9%
forest types
8%
fine roots
8%
forest ecosystems
8%
biogeochemical cycles
8%
microbial activity
7%
soil
7%
soil properties
7%
soil organic matter
6%
soil water
6%
phosphorus
5%
environmental factors
4%
calcium
4%
nitrogen
4%
methodology
3%
Earth & Environmental Sciences
soil depth
88%
oak
84%
pine
73%
decomposition
61%
litter
15%
enzyme activity
11%
fine root
6%
biomass
6%
experiment
6%
carbon
6%
nutrient cycling
5%
microbial activity
5%
forest ecosystem
5%
soil property
4%
soil surface
4%
soil
4%
soil moisture
4%
environmental conditions
4%
calcium
4%
phosphorus
3%
organic matter
3%
rate
3%
nitrogen
3%
effect
1%
method
1%