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Diagnostic Techniques for Soils and Crops, Their Value and Use in Estimating the Fertility Status of Soils and Nutritional Requirements of Crops. Prepared by Firman E. Bear (And Others) Edited by Herminie Broedel Kitchen

Firman Edward Bear

出版	American Potash Institute, 1948
URL	http://books.google.com.hk/books?id=VaYBcgAACAAJ&hl=&source=gbs_api