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

Author

Listed:
  • Afjal Khan
  • Pankaj Singh
  • Alok Kumar Singh
  • Kumar Anshuman
  • K. N. Rai
  • Sarita Devi Gupta
  • Ankit Singh
  • Susheel Kumar Srivastava

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

Suggested Citation

  • Afjal Khan & Pankaj Singh & Alok Kumar Singh & Kumar Anshuman & K. N. Rai & Sarita Devi Gupta & Ankit Singh & Susheel Kumar Srivastava, 2025. "Depth-Resolved Assessment of Soil Fertility in the Indo-Gangetic Plains: Amhat and Bankepur, Sultanpur, with a Focus on N, P, K, and S," International Journal of Scientific Research in Science and Technology, Technoscience Academy, vol. 12(5), pages 156-167, October.
    • Handle: RePEc:etm:ijsrst:v12:y2025:i5:id:1178
    DOI: 10.32628/IJSRST25125117
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