This paper examines critically the problems of Forest Sites Evaluation and the methods used to solve them so far. The chief components of Eco-Systems determining the growth potential of forest lands have been discussed. The dependent variable of site quality exhibiting real difference in site productivity has been suggested. An easily applicable and accurate empirical method of estimating the potential productivity of the forest lands regardless of the kind of or lack of vegetation has been suggested. The past attempts in solving the problem have also been reviewed. The studies will help the foresters in deciding the forest management operations and putting priorities on afforestations.