Range – 1) Commercial range is the geographic area in which a species is harvested for commercial purposes. 2) Natural range is the geographic area where a species is known to occur under natural conditions without human interference. 3) Home range is the geographic area within which a wildlife species spends most of its time throughout the year.
Reforestation – Reestablishing a stand of trees on an area where forest vegetation has been removed.
Regeneration – The process by which a stand is replaced by natural seed fall, stump sprouts, root suckers, or layering, or by artificial planting of seed or seedlings. Also, young trees.
Release cutting – A cutting operation to release seedlings or saplings from competition with other trees of the same size (a “cleaning”) or from larger and overtopping trees (a “liberation”).
Reproduction – See regeneration.
Risk – The chance of a loss. In some cases, risk can be estimated using probability principles. In other cases, the risk cannot be quantified. The terms “risk” and “uncertainty” are sometimes used interchangeably.
Root collar – The place on a tree seedling stem that differentiates the above-ground stem from the below-ground roots. The stem may be slightly swollen at the root collar.
Root sucker – A shoot that arises from a dormant bud on a lateral tree root, but grows above ground as a new tree. Root suckers usually develop when the parent tree is harvested or is severely damaged.
Roots – That portion of a tree that generally is underground and that functions in nutrient absorption, anchorage, and storage of food and waste products.
Rotation – The number of years required to establish and grow trees to a specified size, product, or maturity.