Moisture conservation using supplemental irrigation on spring wheat
1988
El-Dehni, S. | Perrier, E. | Salkini, A.B. (ICARDA, Aleppo (Syria))
In the Near East and North Africa, spring wheat usually completes the vegetative and tillering stages of plant growth well before the end of effective rainfall, and well-timed light applications of supplemental irrigation if needed at heading, anthesis, or milk stage, which can ensure an increased and stabilized yield. The integration of soil water availability and plant indicators with climate uses water balance methods to accentuate the economic dimension of effectively scheduled irrigation to maximize production. In an area where a crop can be grown by natural rainfall alone but additional water by irrigation stabilizes and improves yield, the irrigation is termed supplemental. Whether to irrigate or not is decided purely on the estimated profitability of doing so, which underscores the importance of scheduling supplemental irrigation by minimum not maximum crop water requirements. The objectives are to improve moisture conservation using supplemental irrigation practices, to determine plant varieties, and level of fertility that respond to supplemental irrigation, to estimate consumptive use, and to determine irrigation scheduling requirements under local conditions to ensure the effective and the efficient use of water for economically increasing yields and stabilizing crop production. The data emphasize that scheduling of suplemental irrigation is as important as quantity of water applied. Lower levels of nitrogen (70 kg/ha) produced the same yield as increased levels, 140 and 120 kg/ha
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