The purpose of the book has been to present an overview of Finland's forests and their importance for the country's economy, and the principles of silviculture based on the ecology of the boreal coniferous forests. This perspective is important when striving to satisfy man's needs without endangering the sustainability of forest ecosystems or reducing their biodiversity in integrating Europe, as well as on a global scale. In order to achieve these goals we must understand the ecology of the forest zones and the silvicultural practices suitable for each zone which depend on it.