PROCEEDINS OF THE THIRD WORKSHOP ON SUSTAINABLE HORTICULTURAL PRODUCTION IN THE TROPICS 26 th to 29 th November 2003, Maseno University (MSU) Maseno-Kenya Editors Abukutsa-Onyango, M.O., A.N. Muriithi, V.E. Anjichi, K. Ngamau and S.G. Agong (HAK, Kenya) A. Fricke, B. Hau and H. Stützel (Hannover, Germany) Horticultural Association of Kenya (HAK) in collaboration with Maseno University (MSU) Jomo Kenyatta University of Science and Technology (JKUAT) and Universitt Hannover __________________________________________________________________________ DAAD-GERMAN ACADEMIC EXCHANGE SERVICES