Crop-Tree Release Increases Growth of 12-Year-Old Yellow-Poplar and Black Cherry
- Lamson, Neil I.
Northeastern Forest Experiment Station, Forestry Sciences Laboratory, Durham, NH.
- Smith, H, Clay
Northeastern Station's Timber and Watershed Laboratory, Parsons, WV.
Precommercial thinning was done in a 12-year old Appalachian hardwood sapling stand in West Virginia. Two crop-tree release techniques were used-crown touching and crown touching plus 5 feet. Results indicated that both treatments significantly increased 5-year DBH growth for released yellow-poplar and black cherry crop trees. Although there was a major increase in DBH growth, caution is suggested when using the crown-touching plus 5 treatment as butt-log quality response was not conclusive. Releasing crop trees with the crown-touching approach seems appropriate in sapling stands when applied to desirable stems on better sites.
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