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20131
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Subject: Soil Science × Author: Ashwini H. Gudigar × Start date: 1961 × Thesis Type: M.Sc ×
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    ThesisItemOpen Access
    Effect of Magnetic Treatment on Irrigation Water Quality, Soil Properties and Growth of Sunflower Corp
    (UAS, Dharwad, 2013) Ashwini H. Gudigar; Manjuunatha Hebbara
    Experiments were conducted to study the effect of magnetic treatment on irrigation water quality, soil properties, leaching efficiency of salts and growth of sunflower crop during 2011- 2012 at College of Agriculture, UAS, Dharwad. Four separate experiments were conducted to achieve the objectives. Irrigation waters with different salinity levels of i.e., 2, 4, 6, 8, 12 and 16 dS m-1 were obtained by equilibrating natural saline soil with good water in the ratio of 1:3 and used in the studies along with GW (0.6 dS m-1). For magnetic treatment, the waters were passed though the magnetic device as required for each study. The one-time magnetic treatment of irrigation water significantly decreased electrical conductivity but the effect on pH was variable. With multiple magnetic treatments, the difference between treated and untreated became increasingly narrow. The calcium, magnesium, sodium and sodium adsorption ratio also followed the same trend. The magnetic treatment also had mollifying effect on residual sodium carbonate of water. In general, the decrease was of higher magnitude at lower level of water salinity. Intermittent irrigation with magnetized water significantly decreased soil pH but increased soil salinity. Soil exchangeable calcium, sodium and exchangeable sodium percentage decreased due to irrigation with magnetized water. Soil water soluble calcium, magnesium and sodium decreased due to magnetized water irrigation. The magnetic treatment significantly decreased the dispersible clay content over non-magnetized water use. Leaching a saline soil with magnetized water removed more salts from the soil compared to leaching with non-magnetized water. Soils leached with magnetized water had significantly higher leachate salinity and lower soil salinity compared to leaching with nonmagnetized water. The magnetic treatment significantly increased germination percentage, plant height and dry matter yield in sunflower over non-magnetized water use. The magnetic treatment increased the K/Na ratio and improved its salt-tolerance.