[[1]] type of trees were preferred by the forest department .
 

Sal and Teak trees are the trees which are used for  building ships or railways by the colonial government.  Sal wood or Shorea Robusta is  also called  Sal which  is the species of trees that are  belonging to the Dipterocarps family.  Tectonic grandis is a tropical hardwood which are the tree species that are placed in the flowering plant of family Liliaceous.