Agriculture & Biology
corn
99%
soil
84%
nitrogen
69%
animal manures
63%
phosphorus
58%
crops
55%
soybeans
49%
water
45%
Azospirillum brasilense
42%
cropping systems
38%
grain yield
37%
climate
37%
subsurface drainage
36%
cover crops
35%
Camelina
35%
crop models
33%
irrigation
30%
poultry manure
29%
fertilizers
28%
planting date
27%
Corn Belt region
27%
nitrates
26%
simulation models
25%
Heterodera glycines
25%
winter
24%
drainage
24%
soil quality
23%
peanuts
22%
wheat
21%
alfalfa
20%
ash (inorganic matter)
20%
soil properties
20%
soil water
19%
weather
18%
silicon
18%
irrigation management
18%
Zea mays
18%
tillage
18%
testing
17%
production technology
17%
soil organic carbon
17%
soil transport processes
17%
sweetcorn
17%
rain
16%
lethal dose
16%
irrigation water
15%
water use efficiency
15%
meteorological data
15%
rye
15%
clay soils
15%
drainage channels
14%
corn silage
14%
concentrated animal feeding operations
14%
hydrology
14%
stover
14%
Crop Environment Resource Synthesis models
14%
soil profiles
14%
crop production
14%
soil blocks
14%
runoff
14%
uptake mechanisms
13%
clay
13%
2,4-D
13%
crop yield
13%
seed yield
12%
biomass
12%
plant available water
12%
farms
12%
Thlaspi arvense
12%
rotational grazing
12%
nitrous oxide production
12%
nutrients
12%
drainage water
12%
soil fertility
12%
soil organic matter
12%
fluid mechanics
12%
arid lands
12%
rain intensity
12%
nitrogen fertilizers
12%
growth models
12%
growing season
11%
Bradyrhizobium
11%
no-tillage
11%
cropping sequence
11%
sediments
11%
infiltration rate
11%
triple superphosphate
11%
nutrient use efficiency
11%
oscillation
11%
biochar
11%
soil water content
11%
drainage systems
10%
corn stover
10%
pastures
10%
silicates
10%
fractionation
10%
soil pH
10%
Earth & Environmental Sciences
maize
100%
crop
70%
soil
66%
manure
62%
phosphorus
49%
nitrogen
49%
cropping practice
45%
soybean
44%
drainage
42%
cover crop
35%
wheat
33%
fertilizer
28%
irrigation
26%
inoculation
26%
soil test
24%
water
23%
nitrate
23%
water use
23%
tillage
22%
effect
22%
winter
20%
farm
20%
management practice
18%
loss
18%
agricultural land
18%
septic tank
17%
soil water
17%
runoff
16%
ash
15%
rate
15%
cultivar
15%
water quality
14%
nutrient
13%
weather
12%
biomass
12%
health
12%
hydraulic property
12%
harvest
12%
additive
11%
alfalfa
11%
planting
11%
soil property
11%
watershed
10%
urea
10%
water use efficiency
10%
fractionation
10%
ammonium
10%
nitrous oxide
9%
growing season
9%
hydrology
9%
trial
9%
simulation
9%
risk factor
9%
canopy
9%
cereal
9%
crop rotation
9%
soil moisture
9%
superphosphate
8%
risk management
8%
yield response
8%
North America
8%
drain
8%
bioreactor
8%
bromide
8%
organic carbon
8%
silicon
8%
soil profile
8%
solar radiation
8%
crop production
8%
effluent
8%
snowmelt
7%
pathogen
7%
chlorosis
7%
lysimeter
7%
ecosystem analysis
7%
forecast
7%
aggregate stability
7%
drip irrigation
7%
crop yield
6%
fallow
6%
pollutant reduction
6%
soil moisture regime
6%
production system
6%
tile drain
6%
environmental chemistry
6%
drainage water
6%
in situ measurement
6%
modeling
6%
growth and development
6%
penetration
6%
water stress
6%
field study
6%