. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 10 BULLETIN 244, U. S. DEPARTMENT OF AGRICULTURE. Figure 3, based on measurements of 34 well-stocked shortleaf pine stands in Arkansas, represents graphically the proportion of clear length to crown length for trees of various heights on the better and poorer quality of situations. The lengths of the crown and clear stem and their proportion of the total height of the tree are given in Table 3. In New Jersey 70-year-old stands 65 feet high had practically the same actual depth of canopy as vigorous stands 50 years old
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 10 BULLETIN 244, U. S. DEPARTMENT OF AGRICULTURE. Figure 3, based on measurements of 34 well-stocked shortleaf pine stands in Arkansas, represents graphically the proportion of clear length to crown length for trees of various heights on the better and poorer quality of situations. The lengths of the crown and clear stem and their proportion of the total height of the tree are given in Table 3. In New Jersey 70-year-old stands 65 feet high had practically the same actual depth of canopy as vigorous stands 50 years old and 80 feet in height in Arkansas. The proportion of clear length to total height in New. 55 -46 39 32 25 /8 /O 5 C 4 8 /3 /3 25 3/ '38 -?6 Clear CertytfC of' Tre&'oelow Crown*—feeh. Fig. 3.—Relative proportions of clear length and crown depth for shortleaf pine of various heights on better and poorer qualities of site in Arkansas. Jersey was about 48 per cent, as compared with 70 per cent for the better stands in Arkansas. Table 3.—Clear length and crown length of dominant trees in well-stocked stands of shortleaf pine in Arkansas. Total height of tree (feet). 10 20 30 40 50 60 70 80 90 Better ouality site. Clear length. Crown Feet. Per ct. Feet. 5 50 5 10 50 10 18 60 12 25 63 15 32 64 18 39 65 21 46 67 24 55 69 25 63 70 27 Per ct. 50 50 40 37 36 35 33 31 30 Poorer quality site. Feet. ength. Crown Per ct. Feet. 40 6 40 12 43 17 47 21 50 25 52 29 54 32 .)/ 34 60 37 Perct. 60 60 57 63 50 48 46 43 40 CROWN SPREAD AND TREE DIAMETER. In well-stocked stands of shortleaf pine a very close relationship has been found to exist between the diameter of the tree at breast height and the diameter of the crown. This relationship is striking in its. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States.
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