Earth & Environmental Sciences
harvest
49%
crop
39%
crop production
33%
trend
27%
world
13%
agricultural land
12%
demand
10%
fallow
9%
social impact
8%
land
8%
farming system
8%
crop yield
8%
tropics
7%
population growth
7%
environmental impact
6%
statistics
5%
need
4%
Medicine & Life Sciences
Crop Production
100%
Direction compound
39%
Biofuels
19%
Population Growth
17%
Social Change
16%
Statistics
10%
Social Sciences
Agricultural land
35%
trend
26%
tropics
19%
biofuel
16%
population growth
13%
environmental impact
12%
social effects
12%
statistics
10%
demand
9%
evaluation
6%
Engineering & Materials Science
Tropics
16%
Biofuels
12%
Environmental impact
10%
Statistics
8%