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YIELD RESPONSE OF BREAD WHEAT (TRITICUM AESTIVUML.) TO WATER UNDER IRRIGATED AGRICULTURE CONDITIONS | ||
| The Iraqi Journal of Agricultural Science | ||
| Article 1, Volume 37, Issue 1, 2006, Pages 27-34 | ||
| Authors | ||
| M. I. Aoda; A. D. Sulieman; N.T. Mahdi | ||
| Abstract | ||
| Under irrigated agriculture, especially when the quantity of irrigation water is limited, it is important to determine the evapotranspiration for the different crops in an irrigation project. Moreover, it is even more important to study the economics of water resources used in this project to evaluate the effect of water deficit on crop productivity. In order to do this, Stewart el til (12) model was used to evaluate the relationships between relative yield decrease and relative evapotranspiration deficit, from which bread wheat response factor was evaluated. This model was used to evaluate the yield response of wheat to different irrigation levels in field and lysimetric experiments. It was found that this model was quite capable for predicting the quantity of irrigation water needed to produce a certain quantity of wheat grain yield. The linear relationships between the actual grain yield of water and consumptive use showed that the crop response factor was 0.873 for all data where the actual evapotranspiration is less than the maximum evapotranspiration (ETa Keywords | ||
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