Earth & Environmental Sciences
paper
81%
mill
69%
leaching
60%
nitrate
57%
waste paper
53%
incorporation
33%
plowing
32%
iceberg
32%
crop residue
16%
nitrous oxide
13%
cropping practice
13%
suction
12%
soil
11%
experiment
10%
crop
9%
effect
9%
biomass
8%
summer
7%
loss
7%
removal
7%
Agriculture & Biology
pulp and paper mills
98%
leaching
77%
nitrates
66%
waste paper
56%
nitrous oxide
45%
Lactuca sativa var. capitata
37%
deep tillage
18%
plowing
15%
crop residues
14%
soil
13%
lettuce
13%
summer
8%
biomass
8%
crops
7%
Engineering & Materials Science
Nitrates
100%
Leaching
96%
Waste paper
58%
Crops
29%
Soils
20%
Biomass
12%
Oxides
11%
Experiments
9%
Chemical Compounds
Leaching
71%
Nitrate
59%
Soil
22%
Application
8%
Reduction
6%
Surface
4%