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The Study of Soil Physical and Chemical Properties in Plant Genetic Protection Area of RSPG, Nampung Dam EGAT, Thailand

This work aims to study soil physical and chemical properties in two forest types including dry dipterocarp forest (DDF) and mixed deciduous forest (MDF) located in Plant Genetic Protection Area under the Royal Initiative of Her Royal Highness Princess Maha Chakri Sirindhorn, Nampung dam EGAT, Sakon Nakhon province, Thailand. The samples were collected 3 times in December 2011, February and May 2012. The results showed that the average values of soil properties in MDF including, soil moisture, electical conductivity, organic matter, total nitrogen, avialable phosphorus and exchangeable potassium were higher than those in DDF. Only soil pH in MDF was less than that in DDF. It can be concluded that MDF have more fertility status of soil than DDF.