Effect of Adding Potassium and Organic Fertilizers on the Readiness of Potassium in the Soil and the Productivity of Yellow Corn

Abstract

The research was carried out on a private farm in Deir Ezzor Governorate during the summer season of 2022 with the aim of studying the effect of adding potassium fertilizer and organic fertilizer on potassium readiness in the soil and the productivity of yellow corn, Ghouta 82 variety. The method of factorial experiments was used in designing the experiment according to a randomized complete block design (RCBD) with three replications. The results showed: an increase in the soil content of soluble and available potassium at the fourth level of potassium fertilizer (200 kg K ha^-1) compared to the other levels, while adding organic fertilizer led to an increase in the soil content of soluble and available potassium at the fourth level (25 tons ha^-1), as for plant characteristics (fresh weight of shoots, chlorophyll, grain yield), we notice that the fourth level of potassium fertilizer is superior to the rest of the levels, as well as the fourth level of organic fertilizer is superior to the rest of the levels and to the control. The interaction of the two fertilizers also had a positive effect on the content of the soil contains potassium, and the best results were at the fourth level of potassium fertilizer and the fourth level of organic fertilizer. As for the studied plant characteristics, the interaction of the fourth and third levels (150 kg K ha^-1) of potassium fertilizer with the fourth level of organic fertilizer achieved a significant superiority over the rest of the levels.