Depth-Resolved Assessment of Soil Fertility in the Indo-Gangetic Plains: Amhat and Bankepur, Sultanpur, with a Focus on N, P, K, and S

Afjal Khan, Pankaj Singh, Alok Kumar Singh, Kumar Anshuman, K. N. Rai, Sarita Devi Gupta, Ankit Singh and Susheel Kumar Srivastava

International Journal of Scientific Research in Science and Technology, 2025, vol. 12, issue 5, 156-167

Abstract: This study assesses soil fertility in the Dubepur district of Sultanpur, located in the Indo-Gangetic plains, to elucidate how physical and chemical soil properties influence macronutrient availability under intensive agricultural practices. Recognizing soil as a dynamic, living system that sustains plant growth, nutrient cycling, water retention, and microbial activity, the research focuses on the interactions among texture, structure, porosity, pH, organic matter, cation-exchange capacity, and macronutrients (N, P, K, S). A two-village survey (Amhat and Bankepur) involved surface soils (0–15 cm) and multi-depth profiles (0–90 cm), with comprehensive analyses of pH, EC, OC, N, P, K, S, Zn, bulk and particle density, texture, and porosity. Results reveal substantial spatial variation: Bankepur exhibits higher nutrient levels (N up to 328.8 kg/ha; P up to 14.2 kg/ha; K up to 138.0 kg/ha; S up to 13.5 ppm; Zn up to 0.88 ppm) compared to Amhat, and notable differences in pH (7.1–8.2) and soil physical attributes (bulk density 1.02–1.48 g/cm³; porosity 35.1–56.4%). Across sites, phosphorus remains deficient (P

Keywords: Bulk and Particle Density; Chemical Soil Properties; Nutrient Levels Texture; Porosity (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:etm:ijsrst:v12:y2025:i5:id:1178

DOI: 10.32628/IJSRST25125117

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