Abstract
The effect of added CaCO3 and iron as ferrous sulphate on the availability of various forms of manganese in light-textured soil was studied in laboratory at room temperature. All forms of manganese decrease with increase in added CaCO3 upto 16%. Application of iron as ferrous sulphate also decreased all forms of manganese. The addition of iron and CaCO3 together showed additive negative effect on the forms of manganese through various reactions. The increase in the time of incubation decreases manganese extracted with all forms of extractants due to oxidation and hydration of manganese to higher insoluble oxides and hydroxides. Ammoni um acetate (pH 7.0) + 0.1 % hydroquinone extracted highest amount of manganese by reducing some of the higher oxides along with lower oxides.
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Dahiya, S.S., Singh, M. Effect of CaC03 and iron application on the availability of manganese in light-textured soil. Plant Soil 46, 239–243 (1977). https://doi.org/10.1007/BF00693129
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DOI: https://doi.org/10.1007/BF00693129