Parameter Tree:
EARTH SCIENCE > AGRICULTURE > FOREST SCIENCE > AFFORESTATION/REFORESTATION

Definition:
Afforestation: "the establishment of trees on an area that has lacked forest
cover for a very long time or has never been forested. "
Reforestation: " the natural or artificial restocking (i.e., planting, seeding)
of an area with forest trees. Also called forest regeneration. "


Reference:
Government of British Columbia, Canada, Ministry of Forests, Glossary of Forest
Terms
http://www.for.gov.bc.ca/pab/publctns/glossary/glossary.htm