The physiological role of potassium and calcium spraying on 2 – productive characteristics of two potato varieties

An experiment was carried out in the forest area during the spring growing season 2021 to study the physiological role of calcium and potassium spraying some productive characteristics of two potato varieties. The experiment included three factors of 18 treatments. The first factor was two cultivars of imported potatoes Fandango and Sifra, second factor is calcium in three concentrations (0, 500, 100 mg. L-1) the third factor was potassium in three concentrations (0, 2.5, 5 g. L-1). The experiment was carried out in the field using the Split-Split_plot system within the RCBD design, the cultivars were placed in the main plots and calcium concentrations in the secondary plots, while the sub-sub plots included potassium concentrations and each treatment was repeated three times. The results showed that Sifra plants were significantly superior to Fandango plants in the total number of tubers, the yield of one plant, the total yield per unit area, the marketing yield of the plant, and the marketing yield of tubers per unit area. While the plants of the cultivar Fandango were significantly superior to the plants of the cultivar Sifra in total tuber weight.&nbsp