Vol. 7, Issue 10, Part A (2025)

A field investigation was conducted during the Kharif seasons of 2022 and 2023 at the Agronomy Instructional Farm, Department of Agronomy, Chimanbhai Patel College of Agriculture, Sardarkrushinagar Dantiwada Agricultural University, to examine nutrient content and uptake in Kharif groundnut as influenced by potash, iron, and zinc levels. The experiment comprised a total of 27 treatment combinations, formulated by integrating three levels each of potassium (K₀: 0, K₁: 25, K₂: 50 kg K₂O ha⁻¹), iron (Fe₀: 0, Fe₁: 15, Fe₂: 30 kg Fe ha⁻¹), and zinc (Zn₀: 0, Zn₁: 8, Zn₂: 16 kg Zn ha⁻¹). The treatments were laid out in a factorial randomized block design (FRBD) with three replications to ensure experimental precision and statistical robustness. Pooled results over two years indicated that an application of potash, iron, and zinc significantly influenced both nutrient content and uptake in groundnut. Potash application notably enhanced nitrogen content in the kernel and potassium content in the kernel, shell, and haulm, while 50 kg K₂O ha⁻¹ recorded the highest total uptake of N, P, K, Fe and Zn. Iron application improved nitrogen content in the kernel, sulphur content in the haulm, and iron content in all plant parts, with 30 kg Fe ha⁻¹ resulting in significantly greater uptake of N, P, K, Fe, and Zn. Similarly, zinc application at 16 kg Zn ha⁻¹ significantly increased nitrogen content in the kernel, sulphur content in the haulm, and zinc content in the kernel, shell, and haulm, along with enhanced uptake of N, P, K, Fe, and Zn.