Movement of Sulphate in Some Indian Soils

A laboratory experiment was conducted to study the movement of ³⁵S tagged sulphate in the presence of FYM; CaCO₃ and PO₄^3- in some Indian soils. Eight different type of soils were used in the study. 10 ppm of S through ³⁵S Labelled K₂SO₄ was added on the surface of each soil column. Movement of ³⁵S increased with depth in soils of Balsamand (Typic Ustipsamment), H.A.U. farm (Typic Ustochrept), Hisar (Inceptisol), Kaul (Typic Ustifluvent). Hyderabad black (Vertisol) and Palampur (Entisol) and there was a little effect of FYM, CaCO₃ and PO₄^3- application on the movement. In case of Hyderabad red (Oxisol) and Thiruvananthapuram soils (Ultisol) application of FYM. CaCO₃ and PO₄^3- increased ³⁵S movement significantly. Total recovery of ³⁵S (Morgan's extractable) was found least under FYM application followed by control and PO₄^3- and highest with CaCO₃. The total per cent recovery of ³⁵S was more in Vertisol and less in Oxisol of Hyderabad.