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Selecting superior yellow birch trees; a preliminary guide. ?(1967)
Describes procedures to follow and characteristics to consider in selecting superior yellow birch trees. The first selection should be on the basis of tree quality. Characteristics to consider are as follows: for the stem--straightness, roundness, taper grain, self-pruning, and absence of defects; for the crown--apical dominance, branch angle, and branch diameter; for growth--tree height, stem diameter and volume, length, diameter, and density of the crown, and growth rate.
Author: Clausen, Knud E.; Godman, Richard M.
Source: Research Paper NC-20. St. Paul, MN: U.S. Dept. of Agriculture, Forest Service, North Central Forest Experiment Station
Citation: Clausen, Knud E.; Godman, Richard M.牋1967.牋Selecting superior yellow birch trees; a preliminary guide.牋Research Paper NC-20. St. Paul, MN: U.S. Dept. of Agriculture, Forest Service, North Central Forest Experiment Station.