Age and Vicor Classes in Relation to Timber Markinig

Classified growth tables designed to guide timber marking are presumed to indicate growth possibilities ofter cutting. The biological characteristics of each tree class are presumed to be the cause of rapid or low growth. Experience in the Southwest points to much confusion between cause and effect. Large crowns have been regarded as a necessity for rapid growth, whereas they are really an effect of the same factor that produces rapid hole growth namely, soil moisture as determined by ground space.