Earth & Environmental Sciences
soil
100%
liming
80%
cropping practice
79%
warming
73%
desert
70%
rice
58%
desert soil
56%
plain
55%
playa
48%
ecosystem
47%
climate
44%
polar ecosystem
43%
straw
43%
meadow
39%
ecosystem response
33%
connectivity
33%
nitrogen
31%
soil temperature
31%
community composition
30%
moisture
26%
temperature
26%
biomass
24%
effect
23%
soil respiration
22%
stable isotope
21%
microbial community
21%
bacterium
21%
crop
20%
carbon
20%
experiment
19%
catena
18%
shrub
17%
rate
17%
assimilation
16%
topsoil
16%
soil classification
16%
microbial ecology
16%
carbon storage
15%
meta-analysis
15%
cover crop
15%
ecoregion
15%
global change
15%
agricultural ecosystem
15%
summer
15%
latent heat flux
14%
water availability
14%
phylogenetics
14%
microbial activity
14%
wetland
14%
national park
13%
habitat
13%
experimental design
13%
ecosystem process
13%
lime
13%
X-ray fluorescence
13%
global warming
13%
isotope
12%
phylogeny
12%
citizen
12%
photosynthesis
12%
bioavailability
12%
egg
12%
population dynamics
12%
video
12%
substrate
11%
grassland
10%
exposure
10%
terrestrial ecosystem
10%
loss
10%
respiration
9%
organism
9%
restoration
9%
Agriculture & Biology
soil
89%
ecosystems
80%
liming
63%
Chihuahuan Desert
61%
cropping systems
50%
deserts
41%
playas
39%
desert soils
38%
Danaus plexippus
37%
rice
35%
carbon sequestration
32%
temperature
31%
synthesis
28%
onions
26%
national parks
26%
straw
26%
soil respiration
25%
summer
25%
Apocynaceae
24%
microbial biomass
24%
albedo (reflectance)
23%
grain yield
23%
stable isotopes
23%
nitrogen
22%
climate
22%
grasslands
22%
microbial communities
22%
Aridisols
22%
carbon
21%
Larrea
21%
catenas
21%
Danaus
21%
latent heat flux
21%
soil classification
20%
labile carbon
20%
Asclepias
20%
soil carbon
19%
Mojave Desert
19%
High Plains (United States)
19%
habitat connectivity
19%
soil temperature
18%
global warming potential
18%
shrubs
18%
wetlands
17%
Southwestern United States
17%
assimilation (physiology)
17%
biomass
17%
ecoregions
16%
microbial ecology
16%
microbial activity
16%
bacterial growth
15%
nutrients
15%
meta-analysis
14%
leaves
14%
chronic exposure
14%
soil microorganisms
14%
Ambrosia
14%
field crops
14%
bacteria
14%
agroecosystems
14%
queen insects
13%
economic valuation
13%
meadows
13%
butterflies
13%
no-tillage
13%
cover crops
12%
population dynamics
11%
agriculture
11%
X-radiation
11%
habitats
11%
species richness
11%
case studies
11%
photosynthesis
10%
wet environmental conditions
10%
experimental design
10%