ROOT-CROWN RELATIONS OF YOUNG SUGAR MAPLE AND YELLOW BIRCH

Young'forest-grown sugar maple and measured and diagrammed on the same map. Root yellow birch (1 to 6 inches d.b.h.)crowns were mapped length was considered to be the straight line distance and roots exca.vated. Crown dimensions were compared, from the end of the root to the tree stem. Average root Sugar maple roots usually terminated within a few feet length was calculated from the four longest roots. The of the crown perimeter. Yellow birch roots frequently average crown radius was calculated using the radii at terminated well outside crown perimeters and roots of cardinal points. Trees were cut and total heights birch were more irregularly distributed than those of measured. maple.