The genesis of three soils, viz., Siwaya-I (Typic Ustochrept), Siwaya-II (Typic Natrustalf) and Siwaya-lII (Typic Natraqualf) of Meerut district of Uttar Pradesh was examined using zero point of charge (ZPC). The soils range in degree of their pedogenic development from aportion of soils with only a small accumulation of sesquioxides to a portion of the same soils with extensive accumulation of such oxides. The ZPC values indicate that increase in the morphological development has been accompanied by a decrease in the relative significance of the pH-independent charge as compared with the pH-dependent charge. As a result, the ZPC was more clearly defined and approached the natural pH of the soils and hence can be usedas a measure of pedogenic development.
Zero pointofcharge, surfacecharge properties, soils of Indo-Gangetic plain
