Determination of the sensitivity of the different pistachio (Pistachio vera L.) and olive (olea europaea) varieties to boron (B) deficiency

The aim of this study was to investigate the effect of boric acid (H3BO3) by leaf treatment at different doses (0.2%, 0.4%, 0.6% and 0.8%) on the concentration of B in the leaf of the pistachio and olive plants. Research was designed at random blocks, and 40 trees were used as 2 different pistachio (Pistacia vera L. cvs. Uzun and Kırmızı) and 2 different olives (Olea europaea L. cvs. Ayvalık and Gemlik) plants. As a result of the study, it was determined that the application of B fertilizer (H3BO3) from the leaves did not affect the B concentration in the leaves of the olive plant while it was found that B concentration was affected in the pistachio plant at statistically significant level. In addition, it has been found that the application of B fertilizer on the leaves did not affect the concentration of other elements in the leaves at statistically significant level. In addition, a weak positive correlation was found between B and Mn, Fe and N and Zn and Fe concentrations in leaves of pistachio plant. The negative correlation was found between Mn and K, Fe and N, and a weak positive correlation was found between Zn and Fe concentrations in the leaves of olive plant.