Potassium utilization efficiency of three olive cultivars grown in a hydroponic system.

Highlights: [•] Significantly greater KUE values were found in the T3 and T4 treatments. [•] ‘Koroneiki’ was the most K-efficient cultivar in the T3 and T4 treatments. [•] K concentration affected the plant growth of ‘Kalamon’ and ‘Arbequina’. [•] Greater stomata opening were recorded in the highest (T4) treatment. [•] The photosynthetic rate of ‘Koroneiki’ was not higher in the T4 treatment. [ABSTRACT FROM AUTHOR]