Earth & Environmental Sciences
soil management
100%
fertilizer
73%
soil
71%
management practice
66%
crop husbandry
65%
chlorosis
58%
dietary mineral
50%
crop
48%
antagonism
47%
synergism
46%
nutrient
45%
fulvic acid
41%
meta-analysis
40%
organic waste
40%
petroleum hydrocarbon
40%
soybean
39%
cropping practice
36%
ecosystem service
32%
grassland
32%
cadmium
31%
biodegradation
31%
PAH
31%
nutrient use efficiency
29%
sludge
27%
crop yield
25%
food
24%
iron
24%
degradation
23%
organic carbon
23%
biomass
22%
mineral
21%
book
21%
teaching material
20%
monitoring
19%
landscape management
18%
mineral fertiliser
18%
crop residue
17%
environmental technology
16%
soil quality
15%
tillage
15%
energy intensity
15%
effect
15%
ecological economics
14%
secondary mineral
14%
resource availability
14%
environmental impact assessment
13%
carbon stock
13%
anaerobic digestion
12%
environmental impact
11%
economics
11%
Agriculture & Biology
nutrient use efficiency
56%
slurries
45%
soil management
42%
meta-analysis
41%
synergism
40%
plant cultural practices
39%
antagonism
38%
cropping systems
34%
fertilizers
32%
nutrients
30%
concentrates
29%
crop residue management
27%
minerals
27%
landscape management
26%
mineral fertilizers
25%
liquids
25%
swine
23%
crop yield
22%
mechanization
22%
fertigation
21%
soil
21%
nitrogen
21%
nutrient management
21%
environmental impact
17%
tillage
17%
animal manures
17%
soil quality
16%
crops
16%
irrigation
14%
greenhouse experimentation
12%
crop quality
11%
cropland
11%
nitrogen fertilizers
11%
nutrient-nutrient interactions
10%
greenhouse gas emissions
10%
sustainable agriculture
9%
economic impact
9%
pest management
9%
drainage
9%
grasses
8%
leaching
8%
osmosis
8%
peers
8%
weed control
8%
pig manure
7%
ammonium nitrate
6%
nitrous oxide
6%
cations
6%
acidification
6%
cultivars
5%
Engineering & Materials Science
Soils
85%
Polycyclic aromatic hydrocarbons
51%
Biodegradation
50%
Fertilizers
46%
Ecosystems
39%
Minerals
36%
Hydrocarbons
32%
Crude oil
31%
Degradation
25%
Monitoring
20%
Bioremediation
7%
Biological Availability
7%
Manures
6%
Remediation
5%
Nutrients
5%
Sediments
5%
Land use
5%
Sulfates
5%