Genesis morphology and mineral components of yellow and red soils under cassava in Thailand
1983
Anchalee Suddhiprakarn | Irb Khearuenromne (Kasetsart Univ., Bangkok (Thailand). Faculty of Agriculture. Dept. of Soil Science) | Kannica Yoothong
In 1983 the study on genesis, morphology and mineral components of yellow and red soils under cassava in Thailand emphasized clay characteristics and iron oxides of five yellow and red soils in the Northeast Plateau and Southeast Coast Thailand. X-ray diffraction and differential thermal analyses were employed. The study revealed that the yellow and red soils have kaolinite as the dominant clay mineral whereas vermiculite, smectite and illite can also be found in minor quantities. Content of iron oxides in these soils varies according to soil parent materials. The iron oxide minerals found include hematite, goethite and magnetite. The major clay type and iron oxides in these soils account for their poor fertility status and care should be taken on soil system for fertilizer application. The soils belong to Ultisols and Oxisols and can be correlated well with established soil series in Thailand.
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