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density(3)
fertilizers(3)
lakes(3)
loess(3)
nutrients(3)
particulates(3)
precipitation(3)
runoff(3)
crown(2)
degradation(2)
emissions(2)
invasive species(2)
land management(2)
phosphate(2)
phosphorus(2)
soil fertility(2)
soil moisture(2)
soil ph(2)
soil structure(2)
topography(2)
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