Sempungu, Andrew Comparing farmers' and crop card estimation methods in estimating sw eet potato and cassava yield : case of Uganda / by Sempungu Andre w. - Kampala, 2010. - xiii, 46 p. : ill. ; 30 cm. Unpublished thesis (M. Stat) - Makerere University, 2010. Includes bibliographical references (p. 44-46). Subjects--Topical Terms: Sweet potatoes-- Yields.Cassava.Agriculture-- Mathematical models. Dewey Class. No.: 630.2544