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以土壤实体(Soil entity)为分类研究的主体对象,而以推论性的成土过程及其土壤所处的环境因素作为分类学的论证.红壤、黄壤、砖红壤土类应以〔B〕层为重点,研究其矿质土粒的粉砂粘粒比,有效阳离子交换量及其盐基饱和度,〔B〕层粘粒的硅铝率,粘粒的组成,有机质含量及腐殖质组成等作为其分类指标.黄棕壤土类则以其粘盘为主进行分类指标特征,目前被称为黄棕壤亚类的土壤其重要属性仍接近于红壤类中的黄红壤亚类,不应其地带偏北而向粘盘黄棕壤靠拢.
Soil entity (Soil entity) as the main object of the classification study, and inferred soil formation process and the soil environmental factors as taxonomic proof. Red soil, yellow soil, brick red loam soil should be [B] layer As the focus, we studied its silt clay ratio, effective cation exchange capacity and its salt base saturation degree, the ratio of silica to alumina in clay [B], the composition of clay, organic matter content and humus composition The classification index of yellow-brown soil is mainly based on its sticky-plate classification index characteristics. The so-called yellow-brown soil sub-class of the soil is still close to the important attributes of red soil in the class of yellow-red soil, North and close to the sticky yellow brown soil.