Earth & Environmental Sciences
organic waste
89%
surplus
74%
phosphorus
58%
cattle
35%
soil
34%
residual waste
34%
topsoil
33%
manure
33%
sewage sludge
33%
domestic waste
26%
crop
25%
type of waste
14%
crop production
12%
compost
11%
product
11%
soil profile
10%
trial
9%
demand
7%
nitrogen
6%
sampling
6%
rate
3%
water
3%
Agriculture & Biology
organic wastes
100%
soil treatment
86%
phosphorus
60%
surpluses
53%
sewage sludge
29%
soil
28%
cattle manure
28%
topsoil
26%
households
15%
nutrient offtake
15%
soil profiles
9%
crops
8%
composts
7%
crop production
7%
field experimentation
7%
sampling
5%
nitrogen
4%
water
3%
Medicine & Life Sciences
Soil
88%
Phosphorus
86%
Sewage
78%
Manure
49%
Waste Products
29%
Cattle
24%
Crop Production
18%
Composting
16%
Nitrogen
10%
Water
6%