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agriculture(13)
irrigation(13)
conservation(3)
precipitation(3)
surface water(3)
fertilizers(2)
forests(2)
land resources(2)
nitrogen(2)
sustainability(2)
carbon(1)
deforestation(1)
degradation(1)
diffusion(1)
drainage(1)
drought(1)
evapotranspiration(1)
fisheries(1)
grasslands(1)
human settlements(1)
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