Agriculture & Biology
gravel
48%
preferential flow
46%
alluvial plains
42%
irrigation rates
41%
irrigation management
40%
infiltration (hydrology)
38%
Ozarks
37%
leaching
32%
floodplains
32%
irrigation
30%
phosphorus
30%
alluvial aquifer
26%
soil water
25%
evapotranspiration
24%
corn
23%
macropores
22%
subhumid zones
22%
ecoregions
22%
soil
21%
water
20%
groundwater
18%
hydraulic conductivity
18%
aquifers
17%
electrical resistance
17%
neutron probes
17%
sensors (equipment)
16%
soil water content
15%
canopy
14%
infiltration rate
14%
bank erosion
14%
remote sensing
14%
groundwater flow
13%
soybeans
13%
alluvial soils
13%
crops
13%
energy balance
12%
water table
12%
calibration
12%
image analysis
11%
surface water
11%
runoff
11%
stream channels
11%
rhodamines
10%
subsurface flow
10%
cover crops
10%
infiltrometers
10%
silt
10%
tracer techniques
10%
streambank stability
10%
silt loam soils
9%
Earth & Environmental Sciences
irrigation
52%
floodplain
42%
gravel
32%
preferential flow
32%
phosphorus
25%
aquifer
24%
soil
23%
maize
21%
soil water
21%
hydraulic conductivity
21%
creek
19%
crop
19%
electrical resistivity
18%
evapotranspiration
18%
erosion
18%
evaluation
17%
rate
16%
sensor
15%
canopy
15%
irrigation system
14%
groundwater
14%
vadose zone
14%
infiltration
13%
seepage
13%
berm
12%
water stress
12%
well
12%
ecoregion
12%
runoff
11%
subsoil
11%
water
11%
energy balance
10%
loam
10%
leaching
10%
hydraulic property
10%
silt
9%
in situ
9%
neutron probe
9%
test
9%
water table
9%
permeameter
9%
water content
8%
honey
8%
macropore
8%
experiment
8%
index
8%
drip irrigation
7%
remote sensing
7%
water level
7%
soybean
7%
Engineering & Materials Science
Irrigation
100%
Soils
55%
Infiltration
36%
Leaching
35%
Water
31%
Phosphorus
30%
Gravel
30%
Crops
25%
Aquifers
20%
Hydraulic conductivity
12%
Erosion
12%
Evapotranspiration
12%
Silt
12%
Surface waters
11%
Runoff
11%
Groundwater
9%
Agriculture
9%
Nitrogen
8%
Decision support systems
8%
Water content
8%
Impurities
8%
Nutrients
7%
Sensors
7%
Rain
7%
Soil surveys
7%
Experiments
6%
Remote sensing
6%
Tracers
6%
Seepage
5%
Sediments
5%
Economic analysis
5%
Calibration
5%
Energy balance
5%