Earth & Environmental Sciences
soil carbon
86%
carbon sequestration
78%
soil
64%
nitrogen
51%
crop
49%
meta-analysis
46%
crop yield
45%
tillage
44%
greenhouse gas emissions
41%
soil organic matter
40%
cropland management
37%
ammonia
36%
loss
34%
surplus
33%
soil management
32%
agricultural practice
29%
soil nitrogen
29%
nitrous oxide
28%
nutrient
28%
cropping practice
27%
farm
26%
manure
26%
environmental indicator
25%
poultry
24%
organic carbon
23%
greenhouse gas
23%
production system
22%
climate change impact
21%
liming
20%
grassland
20%
water pollution
20%
peat
19%
lime
19%
county
19%
maize
18%
mitigation
17%
management practice
17%
microbial community
17%
fertilizer
17%
crop production
17%
gene
16%
heavy metal
15%
health
14%
decision
13%
soil fertility
13%
soil quality
12%
agricultural management
12%
zero tillage
11%
livestock
11%
air
11%
Agriculture & Biology
nitrogen
49%
carbon sequestration
48%
meta-analysis
48%
soil organic carbon
41%
crop yield
32%
cropland
29%
surpluses
29%
environmental indicators
29%
nitrous oxide
29%
nitrous oxide production
28%
ammonia
27%
soil carbon
25%
soil
24%
heat sums
22%
tillage
22%
peat
22%
grasslands
21%
climate
20%
soil organic matter
19%
crops
19%
farms
14%
Sander lucioperca
14%
soil fertility
13%
synthesis
11%
fertilizers
11%
water
11%
biochar
10%
crop management
10%
agricultural management
10%
crop production
9%
Archaea
9%
biomass
8%
crop residues
7%
spatial variation
7%
genes
7%
organic fertilizers
7%
cover crops
7%
carbon dioxide
7%
organic soils
6%
bacteria
6%
environmental quality
6%
animal manures
6%
long term experiments
6%
woody biomass
6%
uptake mechanisms
6%
space and time
5%
groundwater
5%
farming systems
5%
agroecosystems
5%
plant cultural practices
5%
Chemical Compounds
Soil
100%
Tillage
52%
Carbon Atom
40%
Soil Organic Matter
30%
Nutrient
30%
Greenhouse Gas
30%
Water Pollution
27%
Soil Fertility
21%
Heavy Metal
17%
Organic Carbon
17%
Ammonia
16%
Nitrogen
13%
Application
9%
Reduction
9%
Leaching
9%
Amount
9%
Soil Acidification
7%
Eutrophication
6%
Heterogeneity
6%
Fertilizer
6%
Ecosystem
5%