. The northern hardwood forest : its composition, growth, and management . ,the tendency of all the species is in the direction of shallow-rootedness,and vice versa. FORM. Tables 50 to 53 (Appendix) show the taper of trees of differentspecies and size, and Tables 5 and 6 give the comparative lengthsand breadths of crown of beech, sugar maple, yellow birch, and bass-wood trees. These figures are average measurements of the crownsof forest trees felled to obtain the growth measurements given inTables 7 to 9, together with the measurements of the sample treesfrom the second-growth plots described
. The northern hardwood forest : its composition, growth, and management . ,the tendency of all the species is in the direction of shallow-rootedness,and vice versa. FORM. Tables 50 to 53 (Appendix) show the taper of trees of differentspecies and size, and Tables 5 and 6 give the comparative lengthsand breadths of crown of beech, sugar maple, yellow birch, and bass-wood trees. These figures are average measurements of the crownsof forest trees felled to obtain the growth measurements given inTables 7 to 9, together with the measurements of the sample treesfrom the second-growth plots described on pages 21 to 27. No regu-lar variation between crown classes was distinguishable, but prac-tically all the trees measured belonged to the upper crown the length and the breadth of the crowns are greatest in themost tolerant and smallest in the least tolerant species, though this 1 O. E. Baker, in The forest problem in a rich agricultural county of Ohio, Forestry Quarterly, vol. 1,No. 2, pp. 138-150 (1908). Bui. 285, U. S. Dept. of Agriculture. Plate
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