Complex sentence: The north-west part of Pratapgarh region has always had dense forests containing valuable trees, thus, in 1828 AD, a separate state forest department was created to manage the state's forest wealth.
Split into simpler sentences: The north-west part of Pratapgarh region has always had dense forests containing valuable trees. Because of this, in 1828 AD, a separate state forest department was created to manage the state's forest wealth.