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hebei province(7)
winter wheat(3)
bashang area of hebei province(2)
cultivar characteristic(2)
deep scarification(2)
environmental evolution(2)
fertilizer application(2)
growth period matching(2)
increased grain yield(2)
low plain of hebei province(2)
magnetic susceptibility(2)
planting pattern(2)
summer maize(2)
air quality(1)
anguli-nuur lake(1)
atmospheric environmental capacity(1)
baiyangdian(1)
casa model(1)
china(1)
chinese government(1)
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