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Topic
acid deposition
31
pH
31
leaching
30
land use
28
mathematical models
28
nitrate nitrogen
28
drinking water
27
aquifers
26
monitoring
26
rain
26
sulfates
26
cations
25
water management
23
losses from soil
22
pesticides
22
anions
21
environmental impact
21
sediments
21
fertilizers
20
forest soils
20