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globalchange

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carbon dioxide(5)
agricultural soil science(4)
climate change(4)
carbon cycle(3)
ecosystems(3)
photosynthesis(3)
seasons(3)
soil respiration(3)
wheat(3)
archaeology(2)
carbon sequestration(2)
carbon sink(2)
cereal crops(2)
china(2)
domestic animals(2)
forest ecology(2)
forests(2)
interpolation(2)
maize(2)
neolithic period(2)
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