Composition and morphology of minerals in clay fraction of Thai paddy soil: Relationship between chemical properties and mineralogy of some paddy soils in central plain
1990
Anchalee Suddhiprakarn | Irb Kheoruenromne | Somsri Watcharasinthu (Kasetsart Univ., Bangkok (Thailand). Faculty of Agriculture. Dept. of Soil Science)
Relationship between chemical properties and mineralogy of some paddy soils in Central Plain were studied by analysis of soil samples collected from genetic horizons of three typical soils. These soils comprised Chai Nat series (Aeric Tropaquepts), Sing Buri series and Bang Phae series (Typic Tropaquepts). Results of the study indicated that their properties related to their fertility status were in the range of medium to good level and they also had good exchange properties. This range of their chemical properties is well correlated with kinds and quantities of high activity clays including smectite and illite and weatherable minerals in silt fraction, namely feldspars and micas. Activities of these clay minerals and weathering of minerals in silt fraction rendered medium to high cation exchange capacity to the soils along with their high base saturation percentages and low exchangeable acidity. Therefore, fertilizer management on these soils can be relatively simple and the soils did not show any limitation for crop production particularly for lowland rice cultivation practice.
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This bibliographic record has been provided by Thai National AGRIS Centre, Kasetsart University
