3B'S FORESTRY, INCORPORATED
Precommercial Thinning: Order AG-0489-C-10-0006 Fuels Reduction, Bush Hand Pile
Pre-commercial thinning is performed before trees reach merchantable size, which is typically around 4.5 to 8 inches dbh (diameter at breast height, measured at 4.5 ft. above the ground). The objective of a pre-commercial thinning is to reduce densities in overstocked stands to improve the growth of the remaining trees. Overstocked stands can result from natural regeneration when a stand is managed with seed tree or shelterwood techniques or from artificial regeneration by direct seeding. Many pine species regenerate by producing a great deal of seed, resulting in thousands of seedlings per acre. Natural regeneration practices in even-aged systems through seed-tree or shelterwood methods often results in extreme overstocked conditions that, left untreated, can stagnate growth and lengthen rotation ages.
Three methods of pre-commercial thinning juvenile spacing are recognized:
1.Manual techniques employing a wide range of cutting tools including long-handle shears, chainsaws and brush saws
2.Chemical techniques employing a variety of herbicide formulations applied to thinned trees by injections, cuts or sprays
3.Mechanized techniques employing a variety of heavy machinery for severing and/or mulching thinned trees.
This Award utilized technique 1.