The relative tolerance to NaC1 of the olive cultivars 'Amphissis', 'Chondrolia Chalkidikis', 'Koroneiki' and 'Megaritiki' was studied in a nutrient-solution pot experiment. Three-year-old plants produced from cuttings were transplanted to sand-perlite (1/1) culture and irrigated with 1/2 strength Hoagland solution containing NaC1 at various levels, i.e. O, 15, 30, 45, 60 and 80meql -l in the first and 0, 30, 60, 90, 120 and 150meq 1 -I in the second experiment. The overall results indicate that NaCI application had a definite growth-reducing effect under the conditions of the experiment, but to a different extent in each cultivar.
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