• Curtis, Theodore
  
• Shropshire, Robert H.
  
• Simmons, Fred
  

In a study of uneven-age management of northern hardwoods, components of average annual growth were calculated for residual stand densities of 40, 60, 80, and 100 square feet of basal area per acre, each having a range of stand structures of 30, 45, and 60 percent in saw timber-size frees. An evaluation of saw timber growth and ingrowth by treatment indicates that timber stand improvement (TSI) in poletimber-size trees is useful for improving quality and altering species composition when acceptable regeneration is maintained. The treatment that mainlined high-quality saw timber production and acceptable saw timber growth and balanced pole timber production was one that produced a residual stand of 80 square feet of basal area per acre, with 45 percent sawtimber-size trees.