The effect of soil salinity on yield, growth, leaf contents of Na and Cl of three olive cultivars in a 2,year field study was studied. Relative olive fruit yield was unaffected up to a soil salinity of 2.2 dS/m, for "Agizi Aksi" and "Agizi Shami" and 1.2 dS/m for "Teffahi" cultivar. Each unit increase in salinity above 2.2 dS/m reduced yield 3.4 percent for "Agizi Aksi" and 4.8 percent for "Agizi Shami". In "Teffahi" cultivar, each unit" increase in the salinity above 1.2 dS/m reduced yield 5.2 percent. Vegetative growth was more tolerant to salinity than fruit yield production. The results place olive in moderately tolerance category for salinity. Increasing the level of soil salinity increased Na and Cl concentrations in the leaves for the threeolive cultivars but to different degree. The accumulation of sodium and chloride in the leaves was considerably higher in respect to the least tolerant, cultivar "Teffahi" than the most tolerant cultivar (Agizi Aksi). The net return of olive trees production reduced 4 percent, 5.3 percent and 5.9 percent with each unit increase in soil salinity above 2.5, 1.9 and 1.7 dS/m for "Agizi Aksi", "Agizi Shami" and "Teffahi" cultivars respectively.
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