landing.  The area where logs are collected for loading.
          leader.  The growing top (terminal shoot) of a tree. The distance up the main stem of the tree between each whorl of branches generally represents I year of height growth.
          leave trees.  Trees left in or just outside a harvest zone (often otherwise a clearcut) to reseed the area. This is nature's method of reforestation; but it is often slower, and it does not have the more assured results of direct seeding or planting. May also refer to trees left after a thinning.
          litter.  The uppermost layer of the soil, made up of freshly fallen or slightly decomposed organic materials. See duff.
          log.  1. To cut and deliver logs. 2. A tree segment suitable for lumber and other products, typically 8 or more ft long.
          logger.  A person who is engaged in a logging operation; locally, one who moves logs to landings or skidways.
          log rule.  A table showing the estimated or calculated amount of lumber (in board feet) that can be sawn from logs of given length and diameter. 1. Doyle rule.   A simple formula used in the eastern and southern U.S. It underestimates the yield from small logs and over estimates with logs over 28 inches in diameter. 2. Doyle-Scribner rule.   A combination rule, derived by using Doyle rule values for logs up to 28 inches in diameter and Scribner rule for logs larger than 28 inches. 3. International rule.   A formula allowing Y2-inch taper for each 4 feet of length and Vs -inch shrinkage for 1-inch board. In one form, it assumes a V8 -inch kerf; in modified form, it assumes a V4 -inch kerf. 4. Scribner rule.   A diagram rule, one of the oldest in existence. It assumes I -inch boards and V4 -inch kerf, makes a liberal allowance for slabs, and disregards taper. Official rule in many parts of the U.S., including the Pacific Northwest. 5. Scribner decimal C rule.   The Scribner rule modified by rounding off the last digit to the nearest 10 and dropping the zero'. Zeroes are added to total of volumes. Used in Oregon and Washington.
          log scale.  The lumber content of a log as determined by a log rule.
          lookout.  1. Fire spotter. 2. A station or post used primarily in the detection of fires, often an observation tower located on a high point of ground.
          lop.  1. To chop branches, tops, or small trees after felling, so that the slash lies close to the ground. 2. To cut the limbs from a felled tree.

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