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globalchange

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grasslands(21)
nitrification(19)
nitrogen oxides(19)
air pollution(18)
rivers(18)
wetlands(18)
diatoms(16)
maize(16)
water pollution(16)
carbon sequestration(15)
denitrification(15)
forest ecology(15)
nitrogen(15)
soil chemistry(15)
bacteria(14)
china(14)
diet(14)
isotopes(14)
nox(14)
soil respiration(14)
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