International Journal of Chemical Studies
Vol. 6, Issue 1 (2018)
Effect of gypsum incubated organics used as an amendment for sodic soil in greengram
Author(s): T Sundhari, T Thilagavathi, M Baskar, Thamarai Thuvasan and N Eazhilkrishna
Abstract: The use of organic amendments (Pressmud and FYM) either alone or in combination with gypsum or as gypsum incubated organics was compared in the present investigation with an aim to increase the efficiency of applied gypsum under gardenland conditions. A field experiment was carried out during 2016 in ADAC&RI, Tamil nadu comprising of eight treatments replicated thrice in a randomized block design. The treatment details are T1 – Control T2 – 50% GR (gypsum requirement) alone @ 5.2 t ha-1, T3 - FYM @ 12.5 t ha-1 alone, T4 - 50% GR + FYM, T5 - 50% GR incubated FYM, T6 - pressmud (PM) @ 10 t ha-1 alone, T7 - 50% GR + PM and T8 - 50% GR incubated PM with RDF in field (RBD) experiments having three replications. Organic amendments viz., PM and FYM were applied @ 10 t ha-1 and 12.5 t ha-1 respectively and also gypsum was applied @ 50% gypsum requirement (5.2 t ha-1). The organic manures with or without gypsum or as gypsum incubated manures (FYM and PM) were applied basally and incorporated into the soil 30 days prior to sowing as per the treatment schedule. The results of the investigation revealed significant differences in pH, EC, exchangeable Ca2+ and Exchangeable sodium percentage (ESP) among the treatments in comparison with the control. Among the treatments, the highest reduction in ESP (13.42%) and pH (9.20 to 7.86) were recorded by the 50% GR incubated PM (T8). A significant difference was observed in the Number of pods per plant, Number of grains per pod and DMP among the treatments. The reduction in pH and ESP due to addition of 50% GR incubated PM and FYM observed in field experiment resulted in an increase in available nutrients which ultimately enhanced yield of green gram. The treatment T8 recorded the highest grain yield of 457 kg ha-1 followed by T7 (421 kg ha-1) which was 34% and 24% increase in yield over application of 50% GR alone. Therefore, incorporation of gypsum incubated (enriched) organics increased the effectiveness of gypsum in reclaiming sodic soils under gardenland conditions where moisture is a limiting factor.
Pages: 304-308 | 785 Views 33 Downloads
How to cite this article:
T Sundhari, T Thilagavathi, M Baskar, Thamarai Thuvasan, N Eazhilkrishna. Effect of gypsum incubated organics used as an amendment for sodic soil in greengram. Int J Chem Stud 2018;6(1):304-308.