Call Prefix : PR-T

Call Suffix : 1981

Call Cutter : D - SoSc 5

Location : SEARCA Library

Format : TD

Publisher : University of the Philippines Los Baños,

Publication Date : February 1981

Publication Place : Los Baños, Laguna, the Philippines :

Summary : Some physical, chemical, mineralogical and surface charge characteristics of four Alfisols and four Ultisols profiles from different areas in Nakhon Ratchasima province, Thailand, were studied in an attempt to understand more the distinguishing characteristics of Alfisols and Ultisols and to determine the role of a number of these properties in soil classification. Ultisols showed finer texture and higher water retentions but less available water holding capacity and bulk density than Alfisols. The increase in percent clay with depth that met criterion for argillic horizons indicated their fairly well developed profiled. The application of the Pidgeon equation worked out better on Ultisols than on Alfisols in estimating soil moisture content at field capacity and at permanent wilting point based on percent silt, clay, and organic matter.