@INBOOK {FERMONT:2007, title = {Improved cassava varieties increase the risk of soil nutrient mining: an ex-ante analysis for western Kenya and Uganda}, author = {Fermont, A. and Obiero, H. and Van Asten, P. and Baguma, Y. * and Okwuosa, E. *}, editor = {Bationo, A. * and Waswa, B. and Kihara, J. and Kimetu, J. }, year = {2007}, pages = {511--519}, publisher = {Springer}, isbn = {978-1-4020-5759-5}, note = {RTB; Root and Tuber; Cassava.; In: Advances in integrated soil fertility management in sub-Saharan Africa: challenges and opportunities}, }