Earth and Planetary Sciences
Nitrogen
100%
Plant
98%
Ecosystem
81%
Decomposition
59%
Response
57%
Species
54%
Soil
51%
Site
50%
Carbon
45%
Litter
40%
Rate
38%
Biomass
37%
Soil Organic Matter
35%
Investigation
31%
Experiment
30%
United States of America
29%
Loss
29%
Addition
28%
Climate
28%
Plant Specie
27%
Landscape
27%
Heating
25%
Impact
25%
Soil Carbon
24%
Vegetation
24%
Model
24%
Fertilization
23%
Biodiversity
22%
Pool
22%
Global Change
21%
Availability
21%
Research
20%
Increasing
20%
Variation
19%
Atmospherics
19%
Minnesota
18%
Productivity
18%
Leaf Litter
18%
Tundra
18%
Organic Matter
17%
Datum
17%
Deposition
17%
Constraint
17%
Management
16%
Time
16%
Homogenizing
16%
Temperature
15%
Forest
15%
Carbon Sequestration
14%
Climate Change
14%
Agricultural and Biological Sciences
Soil
95%
Ecosystems
79%
Nutrients
62%
Trees
61%
Roots
37%
Biomass
37%
Soil Organic Matter
30%
Forests
30%
Leaves
29%
Tundra
28%
Fires
27%
Plant Litter
25%
Climate
24%
Litter Decomposition
24%
Vegetation
24%
Biodiversity
22%
Fields
21%
Temperature
21%
Models
19%
Area
17%
Soil Carbon
16%
Storage
15%
Landscapes
15%
Lignin
15%
Fine Roots
14%
Quercus
14%
Ecotones
13%
Canopy
13%
Global Change
13%
Cities
13%
Plant Communities
12%
Savanna
12%
Fungal Communities
12%
Grasses
12%
Shrub
12%
Cladistics
12%
Herbivore
11%
Nutrient Availability
11%
Environment
11%
Research
10%
Carbon Sink
10%
Photosynthesis
9%
Soil Organic Carbon
9%
History
9%
Climate Change
9%
Boreal Forest
8%
Aboveground Biomass
8%
Earthworm
8%
Americans
8%
Correlation
8%