Effect of soil and land factors on olive (Olea europaea L.) yield and oil concentration in a rainfed Mediterranean system
Olive (Olea europaea L.) production in Mediterranean environments is mostly practiced under dryland and low-input conditions. The contribution of different soil and land parameters to olive yield is not well understood. The objective of this study was to evaluate the effect of different soil and land factors on olive nutritional status, yield, and oil concentration through surveying 'Zeiti' trees in northwestern Syria. To determine the most yield-affecting factors, correlations were established between yield, on the one hand, and soil/land factors as well as leaf nutrient concentrations, on the other hand. Soil fertility and land parameters (field slope, soil depth) and concentrations of leaf minerals were determined. Total available nutrients per tree were calculated using rootzone volume and nutrient concentrations. Yield correlated well with total available soil potassium (K, r2=0.68), total soil nitrogen (N) amount (r2=0.59), and soil depth (r2=0.56). A model that included soil K amount, soil depth, leaf boron (B), and leaf iron (Fe) concentrations explained 83% of the total yield variation. Oil concentration was weakly correlated to leaf zinc (Zn) (r2=0.37), B (r2=0.25), K (r2=0.20), and manganese (Mn) (r2=0.17) concentrations.
Tubeileh, A., Turkelboom, F., Abdeen, M., Sultan-Tubeileh, K. and Alam-Eldein, S. (2017). Effect of soil and land factors on olive (Olea europaea L.) yield and oil concentration in a rainfed Mediterranean system. Acta Hortic. 1160, 145-150
land slope, leaf mineral concentration, olive nutrition, soil fertility, soil depth