Determination of Total Nitrogen and Carbon in Soils by a Commercial Dumas Apparatus
1964
Stewart, B. A. | Porter, L. K. | Beard, W. E.
A modified Dumas procedure is presented, which extends its application to soils of high organic matter content. The modification eliminates the interference of CH₄ that often causes values to be from 5 to 20% higher than Kjeldahl values. The instrument used for the Dumas procedure can be easily converted to determine C in soils. Changes necessary for this conversion are presented.
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