Agriculture & Biology
soil
83%
subsurface drainage
81%
corn
66%
nitrogen
57%
drainage
57%
phosphorus
54%
soil quality
46%
water
42%
nitrates
41%
soil organic carbon
39%
cover crops
39%
soil properties
39%
soil transport processes
33%
hydrology
32%
poultry manure
32%
cropping systems
30%
ash (inorganic matter)
29%
drainage channels
28%
mineralization
28%
crops
28%
soybeans
28%
tillage
28%
stover
28%
carbon
28%
soil blocks
27%
rye
26%
water quality
26%
soil physical properties
26%
Corn Belt region
26%
drainage systems
25%
soil profiles
24%
nitrous oxide production
24%
drainage water
24%
fluid mechanics
23%
rain intensity
23%
clay soils
23%
plant available water
22%
sediments
22%
biochar
21%
crop production
20%
corn stover
20%
climate
20%
growth models
19%
meters (equipment)
18%
triple superphosphate
18%
soil hydraulic properties
18%
preferential flow
18%
alfalfa
18%
bromides
16%
Earth & Environmental Sciences
drainage
100%
maize
93%
soil
84%
nitrogen
55%
phosphorus
54%
cropping practice
48%
cover crop
46%
nitrate
45%
soybean
44%
water quality
39%
tillage
38%
septic tank
34%
health
33%
loss
31%
manure
31%
agricultural land
27%
water
27%
crop
27%
management practice
27%
carbon
26%
soil property
25%
hydraulic property
23%
nutrient
23%
alfalfa
22%
ash
21%
hydrology
21%
additive
20%
organic carbon
19%
rate
18%
nitrous oxide
18%
winter
18%
drain
17%
indicator
17%
crop rotation
17%
fertilizer
17%
watershed
17%
aggregate stability
17%
effect
16%
North America
16%
runoff
16%
bioreactor
16%
bromide
16%
harvest
16%
effluent
16%
physical property
15%