Conservation Tillage Systems and Water Productivity - Implications for Smallholder Farmers in Semi-Arid Ethiopia —— PhD, UNESCO-IHE Institute for Water Education, Delft, The Netherlands

----- 保护性耕作体系和水生产率-对半干旱埃塞俄比中小农户意义

ISBN: 9780415439466 出版年：2007 页码：132 Temesgen Leye, Melesse CRC Press

Conservation tillage systems have been adopted by farmers in many countries to solve the problem of land degradation and declining water productivity. Direct application of such tillage systems has not been possible among resource-poor, smallholder farmers in semi-arid areas of Ethiopia. Problems such as the lack of rainfall, the costs of herbicide