Mineralization pattern of sulphur in major contrasting soil series of pulses growing areas in Madurai district of Tamil Nadu

Abstract

The rate of mineralization of plant available sulphur from different soluble S sources was determined by Incubation experiment in four major soil series of pulses growing areas viz., Peelamedu (Typic Haplustert), Palaviduthi (Typic Haplustalf), Irugur (Typic Ustropept) and Vylogam (Typic Rhodustalf). The results revealed that different S sources and levels had a significant effect on releasing pattern of S at different days of incubation. Among the three S sources and levels such as S @ 10, 20 and 30 kg ha-1 as Gypsum, Ammonium sulphate and Potassium sulphate, it was observed that with the advancement of incubation period, S was significantly increased upto 70 DAI. Among the four major soil series, the higher S content of 105.2 µg ml-1 was observed in Peelamedu series followed by Irugur > Vylogam > Palaviduthi series.