Poonam Sahjlan, Neha Verma, Jagveer Rawat, Basanti Brar, Garima Narwal, and Jyoti Malik
Abstract
The study investigates the impact of varying proportions of phosphate-rich organic manure (PROM) and di-ammonium phosphate (DAP) on soil health, assessing key parameters such as pH, electrical conductivity (EC), organic carbon (OC), and nutrient availability across different plant growth stages. Treatments include six different combinations i.e., T0 (control), T1 (100% PROM + 0 DAP), T2 (75% PROM + 25% DAP), T3 (50% PROM + 50% DAP), T4 (25% PROM + 75% DAP) and T5 (0% PROM+ 100% DAP). Results indicate that PROM-rich treatments (particularly T1, with 100% PROM) significantly enhanced soil pH, OC, and micronutrient level (Zn, Cu, Fe, Mn) compared to DAP-dominant treatments. The optimal balance between nutrient availability and soil health was observed in T2 (75% PROM, 25% DAP), which maintained high levels of both macronutrients and organic carbon. These findings highlight the complementary effects of PROM and DAP, with PROM enhancing long-term soil quality through pH stabilization and organic matter enrichment, while DAP supports immediate nutrient demands. The results suggest that incorporating PROM into fertilization strategies, particularly at a 75:25 PROM-to-DAP ratio, can optimize crop productivity and promote sustainable soil health management. This study provides valuable insights into effective nutrient management practices for enhancing soil fertility and ensuring sustainable agricultural production.