Policy shifts and adoption of alley farming in West and Central Afri ca / A. A. Adesina [et al]. - Ibadan : International Institute of Tropical Agriculture , 199 9. - 20 p. ; 25 cm. Includes bibliographical references. ISBN: 9781311703 Subjects--Topical Terms: Fallowing ----Africa, West.----Fallowing ----Africa, Central.----