Afforestation is the establishment of tree plantations on land that has not previously been managed for forests. Emphasis is placed on maximizing the use of available land and resources with high yield tree species.
Trees can either be of similar species or mixed in a manner that will result in a stand or forest.
Plantings may be seeds, seedlings, or semi-mature trees.
Trees reduce runoff volume through evapotranspiration and interception and improve the infiltration capacity of the soil, thereby reducing runoff potential.