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Land Classification Glossary

 

Land Classifications Basal Area Jam Acre – Land class based on total area per acre.
Site Class – Classification of forest land in terms of its inherent capacity to grow crops of industrial wood. Expressed in cubic-foot growth per acre per year.
Site Index – Expression of the growing potential of a specific forest site based on the height of a free-growing dominant or co-dominant tree of a representative species in a forest of the same type at a specified age.
Stand Age – Age of trees of the dominant forest type and stand-size class.

Land-Use Classes Gross Area – Entire area of land and water as determined by the Bureau of Census.
Forest Land – Land at least 16.7% stocked by forest trees of any size, or formerly having such tree cover, and not currently developed for non-forest use.
Commercial Forest Land – Forest land capable of producing crops of industrial wood and not withdrawn from timber utilization by statue or administrative regulation. Included are areas suitable for growing crops of industrial wood and generally capable of producing in excess of 25 cubic feet per acre of annual growth.
Non-Commercial Forest Land – Unproductive forest land incapable of yielding crops of industrial wood because of adverse site conditions. Also, productive forest land withdrawn from commercial time use through statue, administrative regulation, or exclusively used for Christmas tree production.
Reserve Forest Land – Noncommercial forests that are productive but reserved for recreation of other non-timber uses.
Land Area – Area of dry land and land temporarily or partially covered by water such as marshes, flood plains, streams, sloughs, and estuaries. Canals less then 1/8 mile wide, lakes reservoirs, and ponds smaller then 40 acres are included as land area.
Non-Forest Land – Land that has never supported forests. Land formerly forested where forest use is precluded by development for non-forest uses, such as cropland, improved pasture, residential areas, and city parks.

Stand Size Classes Non-stocked Areas – Commercial forest land on which the stocking of growing-stock trees is less than 16.7 percent.
Poletimber Stands – Stands at least 16.7 percent stocked with growing-stock trees, with half or more of this stocking in sawtimber and/or poletimber trees. Stocking of trees exceeds that of sawtimber stands.
Sapling-Seedling Stands – Stands at least 16.7 percent stocked with growing-stock trees, with saplings and/or seedlings comprising more than half of this stocking.
Sawtimber Stands – Stands at least 16.7 percent stocked with growing-stock trees, with half or more of this stocking in sawtimber or poletimber trees. Sawtimber stocking at least equals poletimber stocking.

Stocking Classes Fully Stocked Stands – Stands in which the stocking of trees is from 100 to 133 percent.
Medium Stocked Stands – Stands in which the stocking of trees is from 60 to 100 percent.
Non-Stocked Areas – Commercial forest land on which the stocking of trees is less than 16.7 percent.
Over-Stocked Stands – Stands in which the stocking of trees is 133 percent or more.
Poorly Stocked Stands – Stands in which the stocking of trees is from 16.7 to 60 percent.