The deciduous forest at Nam Wa subwatershed,
Nan province, has been deforested for
orchard and annual crop cultivation since 1979 until
it was announced as a conserved area in 1989 by the
cooperation between Lainan people and the Lainan
Tambon Administrative Organization (TAO). At the
present, however, there is no specific management
plan for this area. Therefore, the floristic characters
and soil properties upon the conversed forest
represent the transition from diverse agricultural
activities to regenerating secondary forest at different
stages of succession. It is important to characterize
these stages in order to determine the changes in the
ecosystem and apply the results for decision-making
on management planning.