NITROGEN NUTRITION OF SELF-ROOTED OLIVE IN SAND CULTURE. EFFECT OF NH₄-N/NO₃-N ON GROWTH AND NUTRITIONAL STATUS

The effects of NH₄:NO₃ ratio on growth and nutritional status of self-rooted olive (cv Maurino) were evaluated using hydroponics system. Dry matter production increased when the NH₄:NO₃ ratios were 0.25 and 0.50. On the contrary root/shoot was decreased by using any NH₄ concentration. Nitrogen and phosphorus content, in leaves and roots was increased; cation content, except that K, was sharply lowered.