| Study on Al toxicity level and properties of highland soils in Khun Wang and Inthanon areas wasconducted in 31 pedons, aiming at assessing the relationship between level of Al toxicity and soil properties in order to provide equations suitable for predicting Al saturation of studied soils. Soil pits were used for this research, which included the investigation of general environments of the areas selected. Soil samples were collected with respect to soil genetic horizon and analysed using standard procedures. Soils in both areas were formed from gneiss, granite and diorite and well developed. They had well drained feature. They had low to moderate fertility level, mostly having organic matter accumulation to great depths. The soils under native forest were... |
