Training on Soil Acidification was jointly organized by United Nations Environment Programme (UNEP) Regional Resource Centre for Asia and the Pacific (RRCAP) and the Stockholm Environment Institute (SEI) of York University, the United Kingdom from 25 to 27 March, 2008 in Pathumtani, Thailand. The workshop was attended by participants from the Malé Declaration Member countries. Issues as current status of acidification in different countries, assessment of acidification and experiences from Europe, North America and South China and methodology for mapping sensitive soil modeling the time development of damage in South Asia were discussed in the training.