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biomass (ecology)(2)
cereal crops(2)
ecosystems(2)
winter(2)
agricultural irrigation(1)
agricultural soil science(1)
air pollution(1)
asthma(1)
bacteria(1)
bamboo(1)
data processing(1)
din-sources(1)
dissolved inorganic nitrogen (din)(1)
elderly(1)
fertilizers(1)
forecasting(1)
forest ecology(1)
forests(1)
freshwater(1)
fungi(1)
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