Notes: Effect of Intensive Cleaning on Natural Pruning of Cove Hardwoods in the Southern Appalachians
An 11-year-old cove-hardwood sapling stand in the southern Appalachian Mountains was intensively cleaned in the winter of 1959-60. At age 25, the effect of intensive cleaning on natural pruning of butt logs was not significant for total number of defects for all tree species combined. No strong relationship existed between total defects and site index, number of trees, and basal area. Results did vary by tree species and kind of defect. Red oaks (Quercus spp.) had significantly more knots in uncleaned compartments because of slower diameter growth. White oaks (Quercus spp.) and red maple (Acer rubrum L.) had more large live limbs in cleaned compartments in response to release. Yellow-poplar (Liriodendron tulipifera L.) defects were not correlated to treatment, nor were any of the other kinds of defects on the oaks and red maple. For all species, the southeast butt-log face had more total defects than the northwest face, but differences were small and would have little effect on growing-stock grade. Red maple and yellow-poplar showed best natural pruning; red oaks were intermediate because of prevalence of dead limbs; white oaks were mostly poorly pruned since they had many live limbs in addition to other defects. Forest Sci. 29:27-32.
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Document Type: Miscellaneous
Affiliations: Silviculturist, Southeastern Forest Experiment Station, Asheville, North Carolina 28804
Publication date: 1983-03-01
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