Studies on Different Forms of Sulphur in Alluvial Soil

Abstract

The present study was carried out in the Sadar Tehsil of Pratapgarh District of Uttar Pradesh to examine the different forms of sulphur (i.e., total sulphur, organic sulphur, NaH2PO4 extractable sulphur, heat soluble sulphur and 0.15%CaCl2 extractable sulphur) in its soil. For this purpose, soil samples at thedepth varying between 0 to 120 cm from 10 locations were collected. Theselocations are Bakulahi (S-1), Benipur (S-2), Chakbantod (S-3), Chaughar Pureanti (S-4), Chaukhad (S-5), Jagdishpur (S-6), Jahanaipur (S-7), Jahargo(S-8), Kaila Kala (S-9) and Khurdaha (S-10). It was observed that the totalsulphur content decreases with increasing the soil depth in all the samplinglocations. The similar trend was also observed in organic sulphur, Sodiumdihydrogen ortho phosphate (NaH2PO4) extractable sulphur, heat solublesulphur and 0.15% CaCl2 extractable sulphur.Correlation coefficient studies showed that total sulphur has significantand positive correlation with pH, EC, OC, CaCO3 and sand while negativecorrelation with clay and CEC. Organic sulphur correlated significantly andpositively with all parameters, except clay and CEC which showed negativecorrelation with it. The NaH2PO4 extractable sulphur showed significant positivecorrelation with pH, EC, OC and sand while negative correlation with CaCO3,clay and CEC. Heat soluble sulphur had significant positive correlation withall parameters, except CaCO3 and clay which showed negative correlation withit. The 0.15% CaCl2 extractable sulphur showed positive correlation with pH,EC, OC and sand while negative correlations with CaCO3, clay and CEC.