EFFECTS OF INORGANIC AND FOLIAR ORGANIC FERTILIZATION IN THE PRODUCTION AND NUTRITIONAL STATUS ON 'KORONEIKI' OLIVE TREES IN GREECE

Forty-year-old, se1f-rooted olive trees (Olea europaea L. cv. Koro-neiki) were assessed in Messinia district (southern Greece). Trees were grown in two types of soil: acidic (AC) and alkaline (AL) and they were fertilized with inorganic fertilizers through soil and with organic preparations through foliage with a liquid organic product containing fulvic and humic acids, following totally seven different schedules: The results showed that AC4 treatment significantly enhanced the final length of current shoot of trees (new shoot length), whereas the other organic and inorganic treatments in the alkaline soil did not appear to affect it. Moreover, the experimental data showed that treatments improved the nutritional status of olive trees in general and increased production, especially organic foliar applications in both acidic and alkaline soils (AC3, AC4 and AL3).