Influence of Amendments and Flooding with Saline and Non-Saline Water on Changes in Physico-Chemical Characteristics of a Sodic Soil

TL;DRAbstract

Laboratory experiments were conducted with a highly sodic soil (pH, 10.6, exchangeable sodium percentage(ESP) 96) to evaluate the effect of amendments viz. gypsum @ 50% gypsum requirements (GR), gypsum @ 100% GR, pyrite equivalent to 50% of GR on sulphur (S) basis, pyrite equivalent to 100% of GR on S basis, farm yard manure (FYM) @ 1%, gypsum @ 50% of GR + FYM @ 1%, gypsum @ 100% of GR + FYM @ 1%, pyrite @ 50% of GR on S basis + FYM @ 1%, Pyrite @ 100% of GR on S basis + FYM @ 1% and a control (no amendment) with saline (EC iw 4 dSm 1 ) and non saline (EC 0.4 dSm 1 ) irrigation water on the temporal changes in pH, EC, ESP, exchangeable Ca+Mg, Fe 2+ and Mn 2+ of the soil. With increase in the incubation period after flooding pH and ESP decreased, whereas EC, Fe2+ , Mn 2+ and exchangeable Ca + Mg were increased following amendment applications. FYM alone and/or in combination with gypsum and pyrite brought about conspicuous increase in Fe 2+ and Mn 2+ , the effects being more pronounced

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