Introduction

Abstract

Trees are useful for a growing number of purposes. All the components of the trees from the outermost tips of the rootlets to the last needles or leaves on the twigs have a potential utility value. In addition to the conventional and dominating usefulness of trees as material for buildings and paper products, the wood, bark and chemicals in the trees have recently gained an increasing importance as partial replacements for our dwindling resources of easily accessible, non-renewable and expensive petro-chemical products. Fortunately, our forests with their trees can be renewed for improved and sustained yield by proper management.