1 Mkoga, Z. J.; Lankford,B.; Hatibu, N.; Mahoo, H.; Rao, K. P. C.; Kasele, S.S. 2005. Disparity of attitudes and practices on a concept of productivity of water in agriculture in the Great Ruaha River sub-basin. In Lankford, B. A.; Mahoo, H. F. (Eds.). Proceedings of East Africa Integrated River Basin Management Conference, Sokoine University of Agriculture, Morogoro, Tanzania, 7 – 9 March 2005. Theme one: water productivity – methodologies and management. Morogoro, Tanzania: Soil-Water Management Research Group, Sokoine University of Agriculture. pp.29-39.