Document Type : Research Paper
Abstract
The experiment was conducted at the Research Station of the University of Anbar, College of Agriculture, in the Albuaitha area located on longitude E43.3265 and latitude N33.4537 for the spring season of 2023, with the aim of studying the effect of foliar spraying with the growth regulator CPPU and cobalt on two potato varieties, Rudolf and Albada. The experiment was conducted according to randomized complete block design (RCBD) with the split-split arrangement with three replications. The first factors is varieties, namely (Rudolf and Albada), coded as V1 and V2,allocated to the main plots, the second is CPPU spraying in three different concentrations (0, 3, and 6 mg. L-1), coded as B, and allocated to the sub-plots, and the third factor is cobalt spraying with three concentrations (0, 5, and 10 mg. L-1), coded as C and allocated to sub-sub-plots. The outcome showed The Rudolf cultivar is superior in terms of plant height, leaf area, dry weight, and total yield, at 49.84 cm., 120.25 cm2 Plant-1, 58.86 g. Plant-1, 54.06 tons. ha-1) respectively. The Albada variety was superior in chlorophyll, achieving 22.569 mg 100 g-1 fresh weight). Whereas, for CPPU spraying, the third concentration achieved the highest value in plant height, leaf area, chlorophyll, vegetative dry weight, and total yield, at 49.75 cm. 119.74 cm2. Plant-1, 22.759 mg 100 g-1 fresh weight, 57.94 g. Plant-1, and 61.55 tons. ha-1) respectively. Cobalt, however, in contrast, achieved the third concentration of 10 mg. L-1 in the same characteristics under study, the highest values
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