@article{MOUSTAKAS_BAROUCHAS_VATISTA_KALANTZIS_2021, title={Seasonal changes of macronutrients concentration in olive trees grown in acid and in alkaline soils}, volume={49}, url={https://notulaebotanicae.ro/index.php/nbha/article/view/12498}, DOI={10.15835/nbha49412498}, abstractNote={<p><strong>DOI:</strong> <a href="https://www.notulaebotanicae.ro/index.php/nbha/forthcoming/view/index">10.15835/nbha49412498</a></p> <p>Leaf samples from mature olive (<em>Olea europaea</em> L. cv. ‘Kalamon’) trees were collected monthly from April 2018 to March 2019 from two olive orchards, cultivated one in acid and one in alkaline soil, located in Western Greece. Nitrogen (N), phosphorus (P), potassium (K), calcium (Ca), and magnesium (Mg) concentrations in the leaves were determined and seasonal variation curves were calculated for each nutrient and orchard. The seasonal concentration patterns of N, P, K, Ca, and Mg nutrients were almost similar in both soils. Seasonal variation nutrient curves independently of soil acidity varied according to vegetation stages and no significant differences in nutrient concentrations were observed at different development stages between olives grown in the acid or the alkaline soils, with only one exception the leaf K concentration. The nutrient concentration measured in wintertime was at a sufficient level for optimum olive growth in both orchards. These concentrations could be used as reference values for leaf analysis interpretation and for developing an optimum fertilization program under Mediterranean climatic conditions.</p>}, number={4}, journal={Notulae Botanicae Horti Agrobotanici Cluj-Napoca}, author={MOUSTAKAS, Nicholas K. and BAROUCHAS, Pantelis E. and VATISTA, Panagiota and KALANTZIS, Emmanouil}, year={2021}, month={Nov.}, pages={12498} }