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carbon(4)
emissions(2)
fertilizers(2)
forests(2)
precipitation(2)
agriculture(1)
carbon dioxide(1)
deforestation(1)
drought(1)
erosion(1)
evapotranspiration(1)
land surface(1)
lead(1)
loess(1)
nitrogen(1)
organic carbon(1)
soil erosion(1)
terrestrial ecosystems(1)
vegetation(1)