The influence of Zn, Fe and B applications on leaf and fruit absorption of table olive “Gemlik” based on phonological stages

Four field experiments were established at different locations to study the influence of Zn alone and combined Zn + Fe, Zn + B and Zn + Fe + B applications on leaf and fruit absorption levels by “Gemlik” table olive cultivar (Olea europea L.) trees. The treatments of every experiment were consisted of control, soil and foliar applications. Soil applied Zn did not have an effect on Zn contents of either the leaves or the fruit in each year of the experiments. Every treatments of foliar applied Zn elevated sufficiently Zn contents of the leaves. Four times foliar application of each dose should be conducted due to more evident increases in the fruit Zn contents. Foliar applications of double and triple combinations of Zn with Fe and B increased significantly Zn, Fe and B concentrations in the olive trees.