Earth & Environmental Sciences
nitrate
91%
nitrogen
86%
maize
80%
watershed
74%
crop
70%
loss
67%
fertilizer
54%
phosphorus
50%
tile drain
46%
water quality
44%
soil
44%
wheat
40%
drainage
39%
rate
38%
leaching
37%
potato
36%
management practice
34%
river basin
32%
pesticide
32%
aggregate stability
31%
canopy
31%
desalination plant
30%
farm
27%
fertilizer application
27%
sensor
23%
soil and water assessment tool
23%
productivity
22%
algal bloom
21%
modeling
20%
imagery
20%
index
20%
calibration
20%
precision agriculture
19%
irrigation
19%
sediment
19%
groundwater
18%
geostatistics
18%
spacing
18%
remote sensing
18%
creek
18%
satellite imagery
18%
nutrient
18%
cropping practice
17%
agricultural management
17%
winter
17%
conservation tillage
17%
chlorophyll a
16%
prediction
16%
sea
16%
Agriculture & Biology
corn
79%
Minnesota River
77%
nitrogen
75%
agricultural watersheds
62%
nitrates
53%
crops
49%
soil
49%
remote sensing
48%
water quality
47%
potatoes
43%
leaching
42%
nitrogen fertilizers
37%
total maximum daily load
37%
drainage
34%
phosphorus
33%
calibration
32%
soil properties
28%
sediments
26%
Soil and Water Assessment Tool model
24%
tiles
24%
fertilizers
24%
uncertainty
23%
canopy
23%
ravines
23%
vegetation index
22%
nitrate nitrogen
21%
Thinopyrum intermedium subsp. intermedium
21%
fertilizer application
21%
soybeans
21%
tile drainage
21%
irrigation
20%
wheat
20%
Elaeis guineensis
20%
cropland
19%
irrigation rates
19%
Washington (state)
19%
spatial distribution
19%
subsurface drainage
18%
grain quality
18%
fertilizer rates
18%
precision agriculture
18%
pesticides
18%
sorption
18%
soil management
18%
normalized difference vegetation index
18%
Aphis glycines
17%
cropping systems
17%
irrigation management
17%
water
16%
Engineering & Materials Science
Nitrogen
100%
Soils
92%
Nitrates
88%
Water quality
66%
Drainage
58%
Fertilizers
57%
Watersheds
53%
Nutrients
39%
Precision agriculture
37%
Rivers
35%
Phosphorus
34%
Pesticides
34%
Tile
29%
Water
29%
Chlorophyll
28%
Desalination
28%
Phytoplankton
27%
Leaching
23%
Farms
23%
Agriculture
23%
Remote sensing
22%
Satellite imagery
21%
Land use
20%
Organic carbon
19%
Geographic information systems
17%
Unmanned aerial vehicles (UAV)
17%
Nitrogen fertilizers
16%
Algae
16%
Sensors
16%
Unmanned vehicles
15%
Ground vehicles
14%
Health
13%
Surface waters
13%
Runoff
13%
Soil quality
13%
Antennas
12%
Sediments
12%
Calibration
11%
Biological materials
11%
Conservation
11%
Pollution
11%
Herbicides
11%
Satellites
11%
Lakes
10%
Evapotranspiration
10%
Urban growth
10%
Biological Availability
9%
Groundwater
9%
Water resources
9%