反映土壤理化性质并影响土壤利用管理的颗粒大小级别、矿物学类型和土壤温度级别是理想的土族分类标准；
Three soil characteristics are selected as family classification criteria. They are particle-size class, soil mineralogical type and soil temperature regime.
认为可以根据碳化物颗粒大小，基体露出多少为主的原则，把其分为低级别组织和高级别组织进行参考评级。
According to the size of carbides and the amount of exposed matrix, the annealed structure can be divided into low and high grades.
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