Quantification of Drainage Classes of Korean Soils as Morphological Characteristics

Abstract

Morphological characteristics provide a variety of important information for soils. Drainage class is also deternmined by the morphological characteristics such as soil color, which indicates the redox state of the soil. Soil color is usually measured with the Munsell color chart, which may not allow perfect conformity of results between surveyers. Quantitative approach, therefore, became more important to determine drainage class. In the quantification of the drainage class, we suggetsted following three factors as key points:ⅰ) earth color (hue, value, chroma), color due to rocks, and color due to redox are important factors, ⅱ) If there is a main color and mottles (color by reduction), the amount and degree of color by redox are important, ⅲ) When there is a groundwater level, the depth and the amount of the mottles (color by oxidation) are important determinants. Furthermore, not only the drainage class but also other characteristics should be quantified to create an Korean own classification system suitable for the characteristics of Korea.

Classification of Soil Series in the Saemangeum Reclaimed Agricultural Tide Land

“…불량과 약간불량의 차이는 반문 (산화에 의한 반문)의 양이다. 반문의 양이 2 -50%이면 약간불량, 0 -2%이면 불량이다(Sonn et al, 2020). 조사 결과 A-광포통 (가칭 창제통)과 광포통 모두 약간불량이다.…”