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This article in SSSAJ

  1. Vol. 21 No. 6, p. 592-594
     
    Received: Feb 7, 1957


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doi:10.2136/sssaj1957.03615995002100060006x

A Microscopic Method for the Detection of Alkaline Earth Carbonates in Soils1

  1. R. P. Matelski2

Abstract

Abstract

A microscopic method for the detection and estimation of alkaline earth carbonates in soils is described. Essentially, the method consists of adding 10.7N sulfuric acid to soil on a glass slide and estimating microscopically the carbonates from the number of needle-like crystals of calcium or magnesium sulfate that develop. Trace amounts of carbonates can be estimated. The method is also useful in the determination of the relative number of fragments or coatings of carbonates in soils. Data indicate that soils differ in the thickness of the carbonate coating on minerals and in the presence of concretions or rock fragments.

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