Engineering & Materials Science
Oxidation-Reduction
100%
Urea
93%
Nitrogen
70%
Wetlands
70%
Iron
68%
Soils
59%
Biogeochemistry
10%
Experiments
7%
Surface waters
7%
Iron oxides
6%
Water quality
6%
Land use
6%
Ecosystems
5%
Earth & Environmental Sciences
urea
78%
iron
50%
vegetation
45%
nitrogen
45%
removal
40%
wetland
38%
soil
32%
incubation
27%
effect
17%
inorganic nitrogen
12%
water quality improvement
7%
experiment
6%
soil nitrogen
6%
organic nitrogen
6%
biogeochemistry
6%
anoxic conditions
5%
iron oxide
5%
ecosystem service
4%
field experiment
4%
agricultural land
4%
flooding
4%
surface water
3%
land use
3%
chemical
2%
test
2%
Chemical Compounds
Soil
64%
Urea
60%
Nitrogen
46%
Chemistry
44%
Application
24%
Biogeochemistry
8%
Ecosystem
6%
Surface Water
5%
Iron Oxide
4%
Amount
2%
Time
1%