Withdrawal Resistance of J-Lags from Three Hardwood Species.

The article presents a study on the withdrawal resistance of J-lags from several species of hardwood trees. The researchers installed 19 J-lags in red oaks growing at the Urban Horticulture Center (UHC) in Blacksburg, Virginia, in July 2005. They found that lags offer significant withdrawal resistance in species with moderately dense wood in the absence of decay. They also suggested that decay associated with J-lag installation is minimal after four years for sugar maple and paper birch growing in Massachusetts.