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Selected Properties of Paired Virgin and Cultivated Soils from Major Land Resource Areas

Abelardo Rodríguez-LópezAndrew N. SharpleyDavid Allan PylesDon C. ArnoldRobert Morris AhringStephen R. Koontz

出版	Agricultural Experiment Station, Division of Agriculture, Oklahoma State University, 1988
URL	http://books.google.com.hk/books?id=hsVRAQAAMAAJ&hl=&source=gbs_api