Deal, Christopher William Analyzing the effectiveness of gasifier-produced biochar as a soil a mendment in the humid tropics / by Christopher William Deal. - Kampala, 2009. - xii, 124 p. ill. (some col.); 30 cm. Unpublished thesis MSc (Renewable Energy)- Makerere University, 2009 . Includes bibliographical references (p. 70-72). Subjects--Topical Terms: Soil amendments. Dewey Class. No.: 631.8