Dept. of Soil Science and Agricultural Chemistry, Annamalai University, Annamalainagar-608 002, India
A field experiment was conducted in a clay loam soil low in available sulphur to find out the relative effect of gypsum and Neyveli lignite fly ash (LFA) as sources of sulphur on ragi cv. CO 12. The experiment was carried out with the following treatments viz., T1 - control, T2 - Gypsum @ 80 kg ha−1, T3-Gypsum @ 160 kg ha−1, T4 - Gypsum @ 240 kg ha−1, T5 - LFA @ 2.1 t ha−1, T6 - LFA @ 4.2t ha−1, T7 - LFA @ 6.3 t ha−1. The results revealed that the application of gypsum at 240 kg ha−1 enhanced the grain and straw yield of ragi. It also increased the nutrient content and their uptake. The next best treatment was application of 4.2 t LFA ha−1 and this was comparable with the application of 160 kg gypsum ha−1.
