Vol. 9, Special Issue 8, Part F (2025)

A field study was conducted over two successive kharif seasons (2022 and 2023) at the Regional Research Station Farm of Anand Agricultural University, Anand. The experiment followed a Randomized Block Design with three replications. The results revealed that the treatments had no significant effect on soil pH_1:2.5, EC_1:2.5, available potassium (K₂O), iron (Fe), zinc (Zn), manganese (Mn), and copper (Cu) after paddy harvest during both years and in the pooled data. The pooled average over the two years demonstrated consistent outcomes, with treatment T₁₂ recording the highest soil organic carbon content (0.375%), which was statistically comparable to treatments T₆, T₁₀, T₄, T₁₃, T₇, T₁₁, and T₅. In contrast, T₁ (absolute control) showed the lowest organic carbon content (0.305%), significantly lower than all other treatments. T₁ also exhibited the lowest available nitrogen level (177 kg ha^-1), while T₈ recorded the highest value (225 kg ha^-1), statistically similar to T₆, T₇, T₁₂, and T₁₃. These treatments (T₆, T₇, T₁₂, and T₁₃) also showed significantly higher phosphorus content, ranging from 47.66 to 47.81 kg ha^-1. In comparison, T₁, T₂, and T₃ (control and sole ammonium sulphate treatments) recorded significantly lower phosphorus levels, all below 45 kg ha^-1.