Dietrich Brandis set up the Indian Forest Service in 1864 and helped formulate the Indian Forest Act of 1865. In 1906 the Imperial Forest Research Institute was set up at Dehradun and ‘Scientific Forestry’ was introduced in India. But ecologists believe that this system is not scientific at all and has many defects
(i) In this system natural forest diversity was harmed because different types of trees were cut down.
(ii) This system advocated only those trees in forests which provided timber. It snatched the different needs of forest dwellers. The forest dwellers wanted a mixture of species of trees for their fuel fodder and food.
(iii) It also affected the ecological balance as multi-species forest gradually got converted into plantation.