Diversity and fertility of soils in Inthanon area, Chiang Mai province | ความหลากหลายและความอุดมสมบูรณ์ของดินในพื้นที่อินทนนท์ จังหวัดเชียงใหม่
2009
Jindaluang, W.(Kasetsart University, Bangkok (Thailand). Faculty of Agriculture. Department of Soil Science) E-mail:[email protected] | Anusontpornperm, S.(Kasetsart University, Bangkok (Thailand). Faculty of Agriculture. Department of Soil Science) | Kheoruenromne, I.(Kasetsart University, Bangkok (Thailand). Faculty of Agriculture. Department of Soil Science)
Study on diversity and fertility of soils in Inthanon area, Chiang Mai province was carried out in 15 areas using standard methods for field investigation and laboratory analyses, to characterize differences in their morphology, physical and chemical properties and to assess their fertility levels. The soils occupied areas from 1,276 up to 1,563 m (MSL) with slope percentage ranging from 1 to 62. Most soils are deep to very deep, acidic with sand and silt dominating fine earth and a presence of argillic horizon in all soils. They show diversity in colour, pH, presence of colluviated materials and the depth of weathered materials within profile. Their fertility level is slightly different but mostly medium in the upper part and medium or poorer in the layers between 30 and 100 cm. High organic matter content (46.383.4 g/kg) plays an integral part in enhancing soil fertility level in all soils combining with high amounts of available potassium in some soils. A small amount of bases and high value of exchangeable acidity (GT 10.0 cmol/kg) signify low base saturation percentage (LT 35 percent) which, in turn, has a negative impact on soil fertility level in this Inthanon area.
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