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Current Search ((ALL：grassland productivity))
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grasslands(5)
productivity (ecology)(5)
biomass (ecology)(4)
ecosystems(3)
seasons(3)
carbon dioxide(2)
climate change(2)
grasses(2)
grazing(2)
livestock(2)
rain(2)
drought(1)
farms(1)
legumes(1)
meteorology(1)
photosynthesis(1)
plant ecology(1)
soil respiration(1)
tibetan plateau(1)