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Technical Note

Comparative evaluation of soil organic matter determination using tyurin and dry combustion methods in three soil types in Korea
A-Rin Kim1
,
Hyun-Hwoi Ku23*
1Department of Applied Science in Natural Resources and Environment, Hankyong National University, Anseong 17579, Republic of Korea
2School of Plant Resources and Landscape Architecture, Hankyong National University, Anseong 17579, Republic of Korea
3Soil Environment Research Institute, Hankyong National University, Anseong 17579, Republic of Korea
*Corresponding Author
30 June 2025. pp. 77-83
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Abstract

Soil organic matter (SOM) plays a critical role in nutrient cycling, soil structure, and microbial activity. In Korea, the Tyurin method has traditionally been used to estimate SOM, but environmental concerns and potential inaccuracies have led to increased use of dry combustion. This study compared SOM contents in organic farming, calcareous, and reclaimed tidal soils using both the Tyurin and dry combustion methods. A total of 58 soil samples were analyzed. In organic soils, both methods yielded similar SOM values (~36 g kg⁻¹), while in calcareous soils, dry combustion values were approximately 2.12 times higher. In reclaimed soils, the Tyurin method produced values about 1.6 times greater. Regression analysis revealed strong agreement in organic soils (Y = 0.9092X, R² = 0.88), with weaker relationships in calcareous (Y = 0.4585X, R² = 0.79) and reclaimed soils (Y = 1.1871X, R² = 0.78). The discrepancies are attributed to Cl⁻ and carbonate interferences, suggesting that soil-specific pretreatment is essential for accurate SOM quantification. When appropriate pretreatment is applied, both methods can provide reliable results depending on soil characteristics.

Keywords
Dry combustion
Soil organic matter
Tyurin method
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Information
  • Publisher :Journal of Humanimal Sciences
  • Publisher(Ko) :한경국립대학교 휴머니멀응용과학연구소
  • Journal Title :Journal of Humanimal Sciences
  • Journal Title(Ko) :휴머니멀과학학술지
  • Volume : 1
  • No :2
  • Pages :77-83
  • Received Date : 2025-04-26
  • Revised Date : 2025-05-07
  • Accepted Date : 2025-05-07
  • DOI :https://doi.org/10.23341/jhas.2025.1.2.77
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