"Originating in South America, cassava is now grown in over 100 countries around the world. It is the third most important source of calories in the tropics after rice and maize. Its caloric value, as well as its ability to tolerate dry conditions and poor soils, makes it a key food security crop in developing countries, particularly in Africa. As demand for food grows, there is an urgent need to increase yields in the face of such chall ..."
Agrosphere Nutrient Dynamics, Ecology and Productivity by K. R. Krishna 354 Pages, Published 2003 by Crc Press ISBN-13: 978-1-4822-8005-0, ISBN: 1-4822-8005-1
Conservación de suelos y aguas en la zona andina hacia el desarrollo de un concepto integral : memorias del Taller Internacional Regional Hacia Conceptos Integrales en la Conservación de Suelos y Aguas en la Zona Andina, celebrado en el Centro Internacional de Agricultura Tropical, en octubre de 1997 by José M. Restrepo 230 Pages, Published 1999 by Ciat ISBN-13: 978-958-694-007-8, ISBN: 958-694-007-1