Trends of crop water productivity under Egyptian conditions
2006
El-Marssafawi, Samya M.
The present study was carried out to estimate crop water productivity of winter, summer and perennial crops were estimated in the old lands at Delta, Middle and Upper Egypt regions. The crop productivity through three decades (1972-2002) was obtained from Agricultural Economic Research Institute Bulletins and used with the water consumptive use (ET) to calculate crop water productivity. ET crop was estimated using CROPWAT4.3 model (Derek et al., 1998). Results indicated that crop water productivity (CWP) for winter and summer crops were increased in the second and third decades as compared with the first decade. The CWP for perennials was improved in the third decade as compared with the two others. Delta region is the most efficient in CWP as compared with Middle and Upper Egypt, which gave the highest CWP for most of the crops, followed by Middle Egypt region. Decreasing CWP in Upper Egypt may be related to increase water consumptive us e as a result of high temperature. Increasing CWP of any crop in any region encourage the increasing of the cultivated area in this region. This will help in maximizing the water use efficiency in the region.
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