Many actions of human beings have led to deforestation which has resulted in loss of biodiversity and natural habitats. Therefore, forestry as a subject is very important, as it deals with process of creating, managing, repairing, covering forests and protecting other environmental habitats. Afforestation or reforestation refers to the process of planting trees in a space which was left barren before. This book mainly focuses on the subject of forestry, with special significance on the areas of deforestation and afforestation. The topics introduced in it cover many new and important theories as well as practices under this field. This textbook is an essential guide for both academicians and those who wish to pursue this discipline further.