Thinning as an orderly discipline: A graphic spacing schedule for red pine [Pinus resinosa, Wisconsin]

The key correlation of stem count to height has been applied to define and to regulate the density of the residual stand after periodic thinning of a red pine plantation at Star Lake, Wisconsin. A chosen value of added height growth has determined the length of each thinning interval. Graphic evaluation of data from European yield tables for Scotch pine has served to guard against discordant treatment.