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American Fertilizers

Perry Eugene Howard

出版	U.S. Department of Agriculture, 1932
URL	http://books.google.com.hk/books?id=_ler2_3zWYAC&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN

註釋

In this publication is given a brief description of the production of commercial fertilizer. It is believed that this description, which complex technical discussion and statistics are avoided, will be of use to students, as well as farmers and gardeners.