Agriculture & Biology
groundwater
92%
ammonium
79%
chlorides
72%
land use
32%
sediments
31%
sampling
30%
nitrogen
29%
alluvial plains
27%
groundwater contamination
23%
spatial data
23%
animal wastes
22%
river water
21%
ion exchange
19%
saline water
18%
rural areas
17%
seawater
15%
salinity
13%
physicochemical properties
13%
fertilizers
12%
sodium
12%
Earth & Environmental Sciences
ammonium
70%
chloride
66%
groundwater
51%
nitrogen
25%
land use
18%
animal waste
18%
alluvial plain
16%
salt water
15%
brackish water
15%
sediment
13%
ion exchange
13%
river water
12%
rural area
12%
chemical property
12%
fertilizer
12%
perturbation
11%
sodium
10%
seawater
10%
salinity
9%
parameter
9%
contamination
9%
analysis
3%
Engineering & Materials Science
Groundwater
100%
Nitrogen
39%
Sediments
34%
Land use
33%
Ion exchange
19%
Saline water
18%
Fertilizers
17%
Chemical properties
15%
Seawater
15%
Sodium
14%
Rivers
13%
Contamination
13%
Animals
13%
Water
7%
Chemical Compounds
Groundwater
91%
Ammonium
67%
Chloride
49%
Nitrogen
25%
Fertilizer
17%
Salinity
16%
Sodium Atom
8%
Environment
8%