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Soils of the West African Savanna

其他書名	The Maintenance and Improvement of Their Fertility
出版	Commonwealth Agricultural Bureaux, 1975
主題	Science / Life Sciences / BotanyTechnology & Engineering / Agriculture / Agronomy / Soil Science
ISBN	08519834809780851983486
URL	http://books.google.com.hk/books?id=wbPK1OSsjw8C&hl=&source=gbs_api

註釋The physical and farming background; Fertility and management of soils under present farming systems; Fertility requirements for higher crop yields.