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Comparison of Tyurin Method and Dry Combustion Method for Carbon Analysis in Soils of Low Iorganic Carbon content  

Seo, Myung-Chul (Department of Soil Management, National Istite of Agricultural Science and Technology)
So, Kyu-Ho (Department of Soil Management, National Istite of Agricultural Science and Technology)
Ko, Byong-Gu (Department of Soil Management, National Istite of Agricultural Science and Technology)
Son, Yeon-Kyu (Department of Soil Management, National Istite of Agricultural Science and Technology)
Publication Information
Korean Journal of Soil Science and Fertilizer / v.37, no.5, 2004 , pp. 315-321 More about this Journal
Abstract
To compare soil carbon contents by Tyurin method and dry combustion method, we carried out analysis for 212 samples of agricultural land in Korea. The average values of soil carbon contents analyzed by Tyurin method and dry combustion method were $17.47{\pm}10.80$ and $19.91{\pm}10.63g\;kg^{-1}$, respectively. Both methods were evaluated as acceptable methods for soil carbon contents as the results showed. The results showed that soil texture had little effect on analysis method of carbon contents. Highly significant linear regression equation, Y = 0.846X ($R^2=0.991$), was obtained between carbon contents analyzed by Tyurin method (Y) and dry combustion method (X). As a result of comparison with data of carbon contents of the two methods, about 69% of results at dry combustion method have exceeded to results at Tyurin method. Especially, differences between results at two methods became higher as carbon contents were increasing. Tyurin method has been advantages such as shorter analysis time for one sample, more recognition for carbon analysis, and no need for expensive analyzer, while dry combustion method has simpler procedure, no heavy metal wastes, and more samples for analysis at one time.
Keywords
Organic matter; Carbon analysis; Tyurin method; Dry combustion method;
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