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Intercropping combined with nitrogen input promotes proso millet (Panicum miliaceum L.) growth and resource use efficiency to increase grain yield on the Loess plateau of China

Resource Use EfficiencyProso MilletLand UseSustainable AgricultureAgricultural EconomicsNatural Resource ManagementCrop YieldNatural Resource EconomicsSoil FertilitySocial SciencesNitrogen Input