Comparison of Physicochemical Characteristics of Topsoil and Subsoil for Soil Conservation and Management

So-Jin Lee; Chang-Oh Choo; Jong-Tae Kim; Gyo-Cheol Jeong

doi:10.9720/kseg.2021.4.731

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2021 Vol.31, Issue 4 Preview Page

Technical Note

Comparison of Physicochemical Characteristics of Topsoil and Subsoil for Soil Conservation and Management 토양 보전 및 관리를 위한 표토와 심토의 물리화학적 특성 비교

31 December 2021. pp. 731-739

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Abstract

This research aimed to analyze the characteristics of topsoil for soil conservation and promote the process of turning subsoil into topsoil. The physicochemical characteristics of topsoil and subsoil of different types of soil were compared, and their quantitative differences were examined. 204 soil samples were collected from a total of 102 areas according to rock types. These samples were tested to measure grain size, water content, and unit weight, along with XRF and XRD analyses. The topsoil and subsoil of the soil samples were also analyzed. The results of this research showed that the topsoil and subsoil had different physical characteristics, and that the chemical alteration index of the topsoil was higher than that of the subsoil. This would imply that the topsoil was high in clay minerals since it was directly affected by weathering more than the subsoil. In particular, vermiculite, one of the final products generated from weathering, was common in the topsoil.

Keywords

topsoil

subsoil

physical characteristic

chemical alteration index

clay mineral

본 연구는 토양 보전을 위한 표토 특성 분석 및 심토의 표토촉진화가 목적으로써 지질별 표토와 심토의 물리화학적 특성을 비교하고 정량적 차이를 분석하였다. 토양 시료는 암종별로 총 102개 지역에서 204개 시료를 채취하였으며 입도분석, 함수율, 단위중량, X-선 형광분석, X-선 회절분석에 대한 실험을 수행하고 표토와 심토에 대해 분석하였다. 분석결과 표토와 심토의 물리적 특성 차이가 확인되었으며 표토의 풍화변질지수가 심토보다 높게 나타났다. 이는 표토가 심토보다 풍화에 직접적인 영향을 더 많이 받기 때문에 점토광물의 함량이 높게 나타나는 것으로 판단되며 특히 버미큘라이트의 경우 풍화에서 발생하는 최종산물이므로 표토에서 특히 많이 나타난다.

키워드

표토

심토

물리적 특성

화학적 변질지수

점토광물

References

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Information

Publisher :Korean Society of Engineering Geology
Publisher(Ko) :대한지질공학회
Journal Title :The Journal of Engineering Geology
Journal Title(Ko) :지질공학
Volume : 31
No :4
Pages :731-739
Received Date : 2021-12-13
Accepted Date : 2021-12-30
DOI :https://doi.org/10.9720/kseg.2021.4.731

The Journal of Engineering Geology ISSN:1226-5268(Print) 2287-7169(Online) 지질공학

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