Earth & Environmental Sciences
fallow
68%
drainage water
67%
agricultural land
47%
phosphorus
42%
best management practice
40%
rainfall
22%
canal
21%
farm
20%
drainage
17%
crop rotation
14%
water conservation
12%
rate
11%
drain
11%
eutrophication
10%
national park
10%
protected area
10%
fertilizer
10%
crop
8%
degradation
7%
ecosystem
6%
lake
6%
Engineering & Materials Science
Phosphorus
71%
Drainage
63%
Rain
32%
Water
31%
Canals
24%
Farms
19%
Eutrophication
16%
Water conservation
15%
Fertilizers
12%
Lakes
11%
Degradation
6%
Chemical Compounds
Drainage Water
100%
Phosphorus(.)
49%
Crop Rotation
31%
Eutrophication
22%
Reduction
20%
Fertilizer
18%
Ecosystem
17%
Volume
8%