Effect of continuous cropping and fertilization on the total, organic and available sulphur in a Hapludoll

Authors

  • H.C. Tiwari Department of Soil Science, G.B. Pant University of Agriculture and Technology, Pantnagar - 263 145, India
  • M.S. Gangwar Department of Soil Science, G.B. Pant University of Agriculture and Technology, Pantnagar - 263 145, India
  • Nand Ram Department of Soil Science, G.B. Pant University of Agriculture and Technology, Pantnagar - 263 145, India

Keywords:

Sulphur, total, organic and available, Continuous cropping, Fertilizers, Hapludoll

Abstract

The status of total, organic and three measures of available S, i.e. Ca(H2PO4)2-S, CaCl2-S, and heat soluble S were monitored after 17 years of continuous cropping rice-wheat-cowpea with heavy fertilizer inputs in an Aquatic Hapludoll soil. Total and organic S declined to half without S but built up remarkably with S containing NPK fertilizers. The relative effectiveness to extract available S followed the order Ca(H2PO4)2 > heat soluble > CaCl2. Addition of S-bearing fertilizers enhanced S availability particularly with an increase in NPK levels.

Issue

Section

Research Papers