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Earth and Planetary Sciences
Nitrogen
100%
Atmospherics
32%
Temperate Forest
27%
Terrestrial Ecosystem
24%
Tropical Forest
23%
Dissolved Organic Carbon
16%
Carbon Dioxide
15%
Chile
15%
Methane
14%
United States of America
14%
Biome
13%
Nutrient Loss
13%
Protective Atmosphere
13%
North America
12%
Organic Matter
12%
Soil Water
12%
Dilution
11%
Dissolved Organic Nitrogen
10%
Stable Isotope
10%
Biogeochemical Cycle
10%
Europe
9%
Stoichiometry
9%
Soil Nutrient
9%
Sweden
9%
Annual Variation
9%
Organic Compound
9%
Savannah
9%
Land Use Change
8%
Denitrification
8%
Fynbos
7%
Carbon Sequestration
7%
Plant Community
7%
Precipitation (Chemistry)
7%
Forest Ecosystem
6%
Climate Change
6%
Old-Growth Forest
6%
Shallow Soil
6%
Radioactive Tracer
6%
Tracer
6%
Sulphur Dioxide
6%
Land Use
6%
Plant Specie
5%
Primary Production
5%
Weathering Rate
5%
Nitrogen Cycle
5%
Primary Forest
5%
New Hampshire
5%
Nutrient Cycling
5%
methane production
5%
Field Experiment
5%
Agricultural and Biological Sciences
Nitrogen Fixation
69%
Tropical Forest
63%
Savanna
34%
Nitrogen Assimilation
26%
Lowlands
19%
Temperate Forest
18%
Forest Ecosystem
17%
Biogeochemical Cycle
14%
Biological Nitrogen Fixation
14%
Plant Physiology
12%
Secondary Succession
11%
Nitrogen Cycle
10%
Climate Change
10%
Carbon Sequestration
10%
Ecology
10%
Carbon Sink
10%
Fynbos
9%
Old-Growth Forest
9%
Nitrogen-Fixing Trees
9%
Pinus
9%
Terrestrial Ecosystem
9%
Watersheds
8%
Nutrient Availability
8%
Carbon Dioxide
8%
Plant Community
8%
Biodiversity
8%
Soil Nutrient
7%
Hubbard Brook Experimental Forest
7%
Vegetation Structure
7%
Angiosperm
7%
Soil Organic Matter
7%
Primary Productivity
6%
Tree Growth
6%
Woody Plant
6%
Chronosequence
5%
Forest Soil
5%
Keyphrases
Tropical Forest
33%
N2 Fixation
29%
Nitrogen Fixation
17%
Biological Nitrogen Fixation
16%
Legumes
14%
Nitrogen Loss
14%
Hubbard Brook Experimental Forest
13%
Tropical Carbon Sink
12%
South America
11%
Natural Ecosystems
10%
Surface Water
9%
Nutrient Loss
9%
Global Organizations
9%
Fynbos
9%
Biological Nitrogen
9%
Seasonal Concentration
9%
Global Patterns
9%
Base Cations
9%
Dissolved Organic Compounds
9%
Europe
9%
Stable Isotopes
9%
North America
9%
Longleaf pine Savanna
9%
Aridity
9%
Lowland Tropical Forest
9%
Ammonium Ion
9%
Molybdenum
9%
Phosphorus Limitation
8%
Nutrient Limitation
7%
Biological N Fixation
7%
Nutrient Interaction
7%
Plant nutrients
7%
Dissolved Organic Carbon
7%
Plant Community
7%
SO2 Emissions
7%
Root Traits
6%
Terrestrial Ecosystems
6%
Microbiome
6%
Dust
6%
Nitrogen Fixers
6%
Ecosystem Development
6%
Herbaceous Legumes
6%
Nitrogen Cycle
6%
New Hampshire
6%
Alternative Stable States
5%
Forest Biome
5%
Fixation Rate
5%
Forest Ecosystem
5%
N Cycle
5%
Biome Boundary
5%
N Fixation
5%