soil fertility dynamics in African farming systems Muchena, F. N. Hilhorst, Thea. Drylands Programme text London Drylands Programme, International Institute for Environment and Development c2000 monographic vi, 146 p. : ill., maps ; 24 cm. edited by Thea Hilhorst and Fred Muchena. Includes bibliographical references. Soil fertility Africa Management Agricultural systems Africa Case studies Soils Africa Fertilizer movement Case studies SB126.57 .N98 2000 631.422096 1899825568 UOEL 000 20150430103531.0 3174466