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Résumé :
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Irrigation of Field and Orchard Crops Under Semi-Arid Conditions is a summary of field experiments conducted in Israel during the period 1954-1974.The purpose of the experiments was to establish the optimum irrigation regime for various field and orchard crops and to increase water use efficiency.The studies were carried out in the five main ecological regions of Israel,under a variety of soil and climatic conditions.The climatic conditions were characterized by a warm,dry summer and a cool,rainy winter,with a mean August temperature range of 23 to 32°C,a mean August potential evaporation range of 7 to 10 mm/day and a winter (November to April) rainfall range of 230 to 620 mm.For each crop,data is given on the production function of yield vs.Water application,evapotranspiration rate,optimum irrigation regime and pattern of water uptake from the root zone.The applicability of the information obtained in Israel to other ecological regions depends mainly on the possibility of taking climatic variability into account.An appendix is provided which demonstrates that data from the various ecological regions of Israel can be normalized on the basis of a single variable.Thus,production functions obtained in Israel may be applied to other areas.
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