|Author:||Samia, M. E.|
|Book Group Author:||NA|
Crop water productivity (CWP) is defined as crop yield/water consumptively used in evapotranspiration (ET). Crop water productivity can be quantified in terms of wet or dry, nutritional value or economic return. The present study was carried out to estimate crop water productivity of winter, summer and perennial crops 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. ETcrop was estimated using CROPWAT4.3 model. Results indicate 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 increasing water consumptive use 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.
|Pages:||367 - 392|
|Journal:||Annals of Agricultural Science, Moshtohor|
crop production, crop yield, evapotranspiration, plant waterrelations, productivity, returns, soil water, temperature, water useefficiency, Egypt, North Africa, Africa, Mediterranean Region, MiddleEast, Developing Countries, soil moisture, Plant Water Relations(FF062), Plant Production (FF100), Soil Physics (JJ300)