Abstract
Abstract Damage to residual trees was assessed for two shelterwood cuts and two thinnings in stands of northern hardwoods mixed with spruce. Whole trees were skidded by feller-buncher plus grapple skidder, except for one thinning where trees were felled by chain saw and skidded with a cable skidder. The latter treatment appeared to offer no advantage in reducing the incidence of wounding. From 27 to 47 percent of the residual trees in each treatment were wounded, with the greatest damage in the thinned areas where cutting was the most intense. For all treatments. skidding of whole trees accounted for at least two-thirds of the wounds. Amounts of damage appeared to vary among the three machine operators employed to do the cutting.
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