Summary
A rapid colorimetric field test for the evaluation of organic matter in soils of the State has been evolved. Two c.c. of 2·5 N potassium dichromate and 2·5 c.c. of strong sulphuric acid for 1 gm. of soil have been found to give a fairly good estimate of the organic matter content. The method works well within the limits of ·7–3% of organic matter, and gives a bright green colour for soils containing 3% or more of organic matter, a dark-brown for soils with 1·5% and a reddish brown for soils with 0·7% or below.
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Communicated by Dr. R. J. Kalamkar,b.sc.,ph.d.,f.a.sc.
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Joshi, R.H. A rapid colorimetric method for the evaluation of organic matter of the soils of Madhya Pradesh. Proc. Indian Acad. Sci. 41, 69–73 (1955). https://doi.org/10.1007/BF03050325
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DOI: https://doi.org/10.1007/BF03050325