Vol. 6, Issue 4 (2018)
Critical limit of available magnesium for green gram in soils of Imphal West district, Manipur, India
Author(s): V Venkatesh, RK Kumarjit Singh and N Surbala Devi
Abstract: The critical limit of magnesium in soil and plant (green gram var. DGGS-4) was determined through a pot culture experiment with thirty soils of Imphal West district, Manipur, India for predicting the response of green gram to magnesium application. All the soil samples were acidic in reaction with pH value ranging from 4.01 to 6.42 with mean of 5.43, electrical conductivity from 0.04 to 0.27 dSm-1 with an average of 0.08 dSm-1, organic carbon content from 2.62 to 1.05 % with mean value of 1.94%, cation exchange capacity of the soils from 20.40 to 11.50[cmol (p+) kg-1] with mean value of 16.28[cmol (p+) kg-1]. Most of the soils are clay in texture. Available magnesium content in soils varied from 72.9 to 352.35 ppm with an average value of 185.09 ppm. Available magnesium in the soils was positively and significantly correlated with plant magnesium concentration (r=434**) and its uptake (r=372*). The critical limit of available Mg was established at 164 ppm for soil and 0.12% (1200 ppm) for 45 days old green gram plants. Based on the critical limit, 46.66% of the soils studied were found to be magnesium deficient. Soil containing Mg below this critical limit may respond economically to Mg fertilization for growing Green gram.
Pages: 1092-1097 | 597 Views 120 Downloads
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How to cite this article:
V Venkatesh, RK Kumarjit Singh, N Surbala Devi. Critical limit of available magnesium for green gram in soils of Imphal West district, Manipur, India. Int J Chem Stud 2018;6(4):1092-1097.
