Agriculture & Biology
air pollution
14%
China
39%
climate change
30%
cropland
44%
engineering
10%
fertilizers
9%
food production
12%
groundwater
13%
India
42%
irrigation
9%
land degradation
17%
land use
11%
land use planning
91%
leaf area
31%
multiple cropping
18%
nitrogen
7%
remote sensing
28%
vegetation
9%
Earth & Environmental Sciences
atmospheric pollution
15%
climate change
35%
cropping practice
20%
disturbance
14%
effect
4%
engineering
12%
fertilizer
17%
food production
21%
groundwater
12%
irrigation
15%
land degradation
23%
land use
40%
leaf area
74%
need
10%
nitrogen
12%
program
10%
satellite data
35%
vegetation
12%
world
34%
Engineering & Materials Science
Air pollution
23%
Climate change
66%
Degradation
14%
Earth (planet)
34%
Fertilizers
25%
Groundwater
24%
Human engineering
20%
Irrigation
24%
Land use
73%
Nitrogen
18%
Recovery
13%
Satellites
31%
Social Sciences
air pollution
13%
China
36%
climate change
31%
driver
20%
engineering
7%
food
8%
India
42%
irrigation
14%
Land degradation
18%
land use
12%
Land use management
100%
system model
14%
Medicine & Life Sciences
Air Pollution
14%
China
49%
Climate Change
50%
Fertilization
26%
Fertilizers
19%
Food
8%
Forests
43%
Groundwater
17%
India
53%
Nitrogen
12%