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irrigation(63)
agriculture(17)
carbon(9)
surface water(9)
fertilizers(8)
conservation(7)
nitrogen(7)
precipitation(7)
water management(7)
carbon dioxide(6)
drought(6)
biomass(5)
landscape(5)
evapotranspiration(4)
population(4)
soil moisture(4)
aquifers(3)
infrastructure(3)
lead(3)
methane(3)
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