Effect of Humic Acid and Magnesium on The Qualitative and Quantitative Characteristics and Yield of Okra

The objective of this experiment was to increase the productivity per unit area and improve the qualitative characteristics of okra plants. It was conducted at the College of Agricultural Engineering Sciences, University of Baghdad in summer 2023. Four concentrations each of humic acid at 0, 1, 2, 3 g L-1 and magnesium sulfate at 0, 0.5, 1.5, 2.5 g L-1 were used to study their role and interaction in improving the plants’ qualitative and quantitative characteristics. The experiment used a randomized complete block design (RCBD) with three replicates with each including 16 experimental units. The results were analyzed using the Gen stat statistical program and compared with the least significant difference (LSD) test at a 0.05 probability level. The interaction treatment between humic acid and magnesium (H3M3) showed significant superiority, as the dry weight of the okra plant totaled 446.0 g plant-1. The percentage of potassium in the okra pods and leaves was 1.55% and 1.95%, respectively while protein content was 14.25%. The highest amount of carbohydrates was 20.36%, the lowest amount of fiber in the pods was 6.02% while oil levels were 2.67%. H3M3 also gave the highest percentage of total soluble solids, reaching 7.87%, while H3M2 showed superiority in pod weight at 4.68 gm. pod-. Early yield was reached at 767.0 kg. ha-1