globalchange

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greenhouse gas(3)
straw returning(3)
yield(2)
arid region(1)
biochar(1)
ch_4 emission(1)
corn(1)
cow dung(1)
farmland(1)
global warming potential(1)
growing period(1)
mushroom dregs(1)
n_2o emission(1)
nitrogen reduction(1)
paddy field(1)
rice(1)
stabilized fertilizer(1)
straw return(1)
winter wheat field(1)