Abstract
1. Potassium permanganate in acid medium is found to decompose on heating and the rate of decomposition increases with the period of boiling. 2. A method for estimation of organic carbon in soil by oxidation with alkaline potassium ferricyanide solution is outlined. 3. The results obtained by the potassium ferricyanide method are shown to agree more closely in calcareous soils than other methods with those obtained by the standard dry combustion method. Besides the method is more exact in view of its very sharp end-point.
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