Earth & Environmental Sciences
nitrogen
100%
tropical forest
79%
fixation
78%
nitrogen fixation
63%
ecosystem
55%
soil
51%
phosphorus
50%
temperate forest
43%
nutrient
38%
loss
37%
old-growth forest
37%
savanna
36%
biome
36%
nutrient limitation
35%
brook
34%
stoichiometry
30%
terrestrial ecosystem
30%
canopy
29%
nutrient loss
28%
rainforest
27%
dissolved organic carbon
27%
biological nitrogen fixation
24%
molybdenum
23%
carbon
21%
productivity
20%
watershed
19%
biomass
18%
cation
17%
forest ecosystem
17%
weathering
17%
carbon sink
17%
ecology
16%
tropical plant
16%
biogeochemical cycle
15%
dry deposition
15%
litter
15%
aridity
15%
surface water
15%
forest soil
14%
sapling
14%
fog
14%
nitrate
13%
dissolved organic nitrogen
13%
inorganic nitrogen
12%
rate
12%
isotope
12%
mineralization
12%
nutrient balance
12%
pine
11%
soil nutrient
11%
land
11%
productivity trend
11%
seasonal variation
11%
North America
11%
Cape Floristic Region
11%
dilution
10%
organic carbon
10%
tropical forest ecosystem
10%
vegetation
10%
methane
10%
fynbos
10%
sulfur
10%
climate
10%
ion
10%
removal
10%
forest ecology
10%
precipitation (chemistry)
10%
trend
9%
acidity
9%
montane forest
9%
Europe
9%
consumption
9%
host plant
9%
timescale
9%
epiphyte
9%
test
8%
tracer
8%
primary forest
8%
phosphatase
8%
digitizing
8%
organic acid
8%
biogeochemistry
8%
tropical soil
8%
ecosystem response
8%
acid deposition
8%
water chemistry
8%
effect
8%
woody plant
8%
fine root
8%
chronosequence
8%
seedling
8%
elephant
8%
leaching
8%
bear
8%
land use change
8%
atmosphere
7%
shrubland
7%
nitrogen isotope
7%
nutrient cycle
7%
Agriculture & Biology
ecosystems
88%
tropical forests
83%
nitrogen
75%
nitrogen fixation
59%
phosphorus
55%
nutrients
52%
soil
47%
temperate forests
45%
savannas
41%
terrestrial ecosystems
35%
lowland forests
33%
weathering
32%
old-growth forests
28%
canopy
27%
molybdenum
26%
dissolved organic carbon
25%
nitrogen cycle
24%
tropical rain forests
24%
stoichiometry
23%
biogeochemical cycles
22%
forestry development
20%
Pinus palustris
19%
legumes
19%
dissolved organic nitrogen
19%
Chile
19%
nitrogen-fixing trees
18%
carbon
17%
ecology
16%
Cryosols
15%
soil nutrients
14%
Inga punctata
14%
tropical plants
14%
nitrogen retention
14%
vegetation
13%
forest ecosystems
13%
saplings
12%
biomass
12%
biogeochemistry
12%
experimental forests
11%
forested watersheds
11%
nitrogen-fixing plants
11%
mineralization
11%
Elephantidae
11%
forest ecology
10%
temperate soils
10%
permafrost
10%
tree growth
10%
vegetation structure
10%
tropics
10%
leaves
9%
fynbos
9%
net primary productivity
9%
sediments
9%
chronosequences
9%
shrublands
9%
fine roots
9%
woody biomass
9%
Ursidae
9%
forest soils
8%
nutrient balance
8%
organic matter
8%
carbon dioxide
8%
microbial biomass
8%
epiphytes
8%
global change
8%
stable isotopes
8%
forest canopy
7%
water
7%
phytomass
7%
soil organic matter
7%
woodlands
7%
carbon sinks
7%
organic carbon
7%
dry environmental conditions
7%
thermodynamics
7%
soil water
7%
particulate organic carbon
7%
woody plants
7%
biodiversity
7%
niches
6%
microbiome
6%
interspecific variation
6%
fire frequency
6%
tracer techniques
6%
denitrification
5%
rain
5%
Coriaria
5%
host plants
5%
assimilation (physiology)
5%
environmental factors
5%
dust
5%
potassium
5%
minerals
5%
Medicine & Life Sciences
Forests
85%
Ecosystem
80%
Nitrogen
61%
Soil
56%
Nitrogen Fixation
44%
Nutrients
42%
Phosphorus
32%
Carbon Sequestration
31%
Climate
22%
Fabaceae
17%
Magnoliopsida
15%
Nitrogen Cycle
14%
Climate Change
14%
Growth
13%
Plant Physiological Phenomena
13%
Rainforest
11%
History
10%
Grassland
10%
Molybdenum
9%
Cycadopsida
9%
Mitochondrial Genes
8%
Datasets
8%
Mitochondrial DNA
7%
Carbon
7%
Cations
6%
Respiration
6%
Denitrification
6%
Microbiota
6%
Minerals
6%
Nitrates
6%
Primulaceae
6%
Amaryllidaceae
6%
Anacardiaceae
5%
Yeasts
5%
Apocynaceae
5%
Biomass
5%
