Agriculture & Biology
nitrogen cycle
64%
tundra
62%
history
37%
carbon
31%
soil
24%
glacial deposits
22%
soil organic matter
17%
soil respiration
7%
soil carbon
7%
herbaceous plants
6%
vegetation types
6%
microbial activity
6%
nutrient availability
6%
soil nutrients
6%
mineralization
5%
soil pH
5%
vegetation
4%
calcium
3%
degradation
3%
nitrogen
3%
temperature
2%
Earth & Environmental Sciences
glacial history
66%
tundra
52%
nitrogen
28%
carbon
27%
soil
20%
moisture
13%
soil organic matter
11%
warming
9%
plant production
7%
nutrient availability
6%
soil respiration
6%
brook
6%
soil nutrient
6%
herb
6%
soil carbon
6%
vegetation type
6%
microbial activity
5%
stabilization
5%
incubation
5%
calcium
4%
decomposition
4%
young
4%
organic matter
4%
rate
3%
in situ
3%
vegetation
3%
laboratory
3%
temperature
2%
Chemical Compounds
Tundra
100%
Soil
41%
Nitrogen
29%
Carbon Atom
22%
Soil Organic Matter
17%
Soil Respiration
12%
pH Value
10%
Brook Silaketone Rearrangement
9%
Organic Matter
6%
Nutrient
6%
Calcium(0)
4%
Decomposition
3%
Surface
3%