Physics & Astronomy
ground water
100%
Korea
88%
mass balance
86%
weathering
65%
chemistry
59%
alkalinity
57%
nitrates
51%
evaluation
43%
minerals
34%
cations
28%
calcium oxides
25%
carbonates
25%
silicates
22%
anions
21%
water
19%
aquifers
17%
protons
14%
cements
12%
sulfates
12%
chlorides
11%
stoichiometry
10%
acids
10%
salts
10%
silicon dioxide
8%
decomposition
8%
ions
5%
Earth & Environmental Sciences
mass balance
60%
groundwater
41%
weathering
37%
water chemistry
34%
nitrate
33%
alkalinity
33%
evaluation
32%
cation
28%
anion
21%
lime
21%
mineral
19%
silicate
18%
human activity
17%
carbonate
15%
stoichiometry
12%
ion exchange
10%
nitrification
10%
silica
9%
agricultural land
9%
chloride
8%
cement (construction material)
8%
aquifer
8%
decomposition
8%
sulfate
8%
salt
8%
organic matter
7%
well
7%
acid
7%
land
6%
analysis
6%
material
4%
effect
2%
Chemical Compounds
Mass Balance
81%
Groundwater
74%
Weathering
54%
Chemistry
40%
Nitrate
34%
Mineral
27%
Cation
20%
Carbonate
17%
Nitrification
17%
Proton
14%
Anion
13%
Reaction Stoichiometry
9%
Sulfate
8%
Chloride
6%
pH Value
4%
Acid
3%
Surface
3%
Application
3%