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Clay Mineralogy of Certain Rice Soils in Southern Taiwan¹

ABSTRACT

Clay minerals present in fine-textured rice soils in southern Taiwan were identified by X-ray diffraction and chemical analyses. Dioctahedral mica with high potassium content is the predominant mineral in the clay fraction. These soil clays also contain considerable amounts of iron-rich chlorite, smectite, and vermiculite.

¹ Contribution from Dept. of Soil Science, Chung Hsing Univ., Taichung, Taiwan. Acknowledgement is due to National Science Council for supporting this study.

² Visiting Associate Professor (now, Soil Chemist, Int. Inst. of Trop. Agr., Ibadan, Nigeria), Research Assistant and Professor, respectively.

Received for publication September 14, 1970. Accepted for publication June 2, 1971.