Earth & Environmental Sciences
agricultural land
55%
agroforestry
16%
biological nitrogen fixation
21%
cover crop
18%
crop
10%
crop production
15%
decision
44%
denitrification
12%
dry deposition
15%
ecosystem
8%
effect
6%
farm
11%
fertility
14%
fertilizer
36%
grazing
12%
green manure
21%
land use
46%
leaching
10%
loss
7%
maize
12%
manure
13%
mineral fertiliser
18%
monitoring
36%
nitrogen
8%
nutrient
27%
nutrient balance
100%
phosphorus
10%
policy
8%
potassium
11%
prices policy
23%
productivity
9%
redress
20%
removal
7%
sedimentation
10%
soil conservation
15%
sustainability
10%
tea
16%
water erosion
16%
wet deposition
16%
Agriculture & Biology
agricultural land
68%
agroforestry
19%
corn
10%
cover crops
19%
crop production
16%
crops
9%
denitrification
21%
dry deposition
28%
ecosystems
13%
farms
11%
fertilizers
40%
grazing
14%
green manures
20%
Kenya
35%
land policy
28%
land use
68%
leaching
17%
mineral fertilizers
18%
monitoring
44%
nitrogen
10%
nitrogen fixation
17%
nutrient balance
89%
nutrients
31%
phosphorus
12%
potassium
13%
soil conservation
22%
tea
17%
water erosion
26%
wet deposition
29%