Group Retention : A variant of the retention silvicultural system in which, after harvesting, portions (0.25 hectares or more) of the original stand are retained, with approximately four tree lengths or less between the portions
British Columbia Ministry of Forests and Range, Acronyms and Initialisms for Forestry Terms in British Columbia, Canada 2008. http://www.for.gov.bc.ca/hfd/library/documents/acr onyms/ & http://www.for.gov.bc.ca/hfd/library/documents/glo ssary/Glossary.pdf, (For Fr - Canad) {16}