wenwu zhao*,bojie fu,yang qiu.an upscaling method for cover-management factor and its application in the loess plateau of china.international journal of environmental research and public health qiang ...
主要国际期刊文章:*chinese grain supply and demand in 2010:regional perspective and policy implications.in:german agricultural research.vol 3/2005(55),p.61 – 68.(英文,sci收录论文)1/2*effects of agricultural market p...