黄土高原农牧交错带草业发展前景浅析--对环县苜蓿草产业发展的分析
황토고원농목교착대초업발전전경천석--대배현목숙초산업발전적분석
Primary analysis of the developmental prospect of prataculture in the ecotone of agricultural and animal husbandry in Loess Plateau- A case of lucerne industry in Huanxian county
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