National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692 Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
A field experiment was carried out at Crop Research Farm, Nawabganj, C. S. Azad University of Agriculture and Technology, Kanpur during Rabi 2012-13 and 2013-14 in sodic soil with the initial pH 9.5, EC 2.42 dSm-1, organic carbon 1.2 g kg-1 and exchangeable sodium percentage (ESP) 57.10. Tube-well water used for irrigation was alkaline in nature with pH 8.2, electrical conductivity (EC) 1.19 dSm-1, sodium absorption ratio (SAR) 10.2 m mol1/2 L-1/2 and residual sodium carbonate (RSC) 8.8 me L-1. Application of gypsum @ 25%, 50% and 100% Gypsum requirement (GR) alone and in combination with alkali water passing through 15 cm gypsum bed was found significantly superior over control. The maximum grain and straw yield (38.43 and 43.63 q ha-1) was recorded with the application of gypsum @ 50% GR and alkali water passing through 15 cm gypsum bed treatment and minimum at control. The changes in pH, EC, SAR and RSC values of alkali irrigation water were from 8.2 to 7.8, 1.19 to 1.47, 10.2 to 4.7 m mol1/2 L-1/2, and 8.83 to 4.02 me L-1, respectively when the alkali water was passed through 15 cm gypsum bed. The maximum reduction in pH, EC and ESP was recorded 8.0, 1.87 dSm-1 and 20.0, respectively with the application of gypsum (50% GR) + gypsum bed (15cm) treatment of alkali water. Use of alkali irrigation water (control) considerably raised the value of pH, EC and ESP of soil from 9.5 to 10.0, 2.42 to 2.83 dSm-1 and 57.10 to 66.15, respectively from the corresponding initial values, increase in uptake values of N, P, K, Zn, Ca and Mg was recorded in all treatment over control, whereas, relatively lower uptake of Na was recorded in all the treatment in comparison to control.
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