在母质相同的情况下，脲酶活性高低又与成土时间的长短和土壤熟化程度呈正相关。
Under the same parent material condition, urease activity was significantly correlated with forming time and maturity of soil.
根据自然成土因素和在人为作用影响下的土壤熟化程度，将该小流域的黄绵土进一步划分为四种土壤类型。
According to the natural factors of soil formation and the development, degree of soil, under the influence of human production activity, the Huangmian soils were devided into four types.
土壤磁化率剖面受纬度、土壤母质磁性本底、气候条件、土壤熟化度，及发育度、土壤颗粒等因子的影响。
It was observed that the magnetic susceptibility profile in soils related to the latitude, magnetic base of the parent materials, climatic condition, soil pedogenesis and ripening.
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