. Bulletin. Forests and forestry -- United States. 32 A PRIMER OF FORESTRY. queutly those ou the lower aDcl inner parts of the crowu are more vigorous, plentiful, and persistent than is the case with intoler- ant trees. Thus the crown of a tolerant tree in the forest is usually denser and longer than tliat of one which bears less shade. It is usually true that tlie seed- lings of trees with dense crowns are able to flourish under cover, while those of light-crowned trees are intolerant. This rough general rule is often of use in the study of forests in a new country, or of trees whose silvicul
. Bulletin. Forests and forestry -- United States. 32 A PRIMER OF FORESTRY. queutly those ou the lower aDcl inner parts of the crowu are more vigorous, plentiful, and persistent than is the case with intoler- ant trees. Thus the crown of a tolerant tree in the forest is usually denser and longer than tliat of one which bears less shade. It is usually true that tlie seed- lings of trees with dense crowns are able to flourish under cover, while those of light-crowned trees are intolerant. This rough general rule is often of use in the study of forests in a new country, or of trees whose silvicul- tural character is not known. TOLERANCE AND IN- TOLERANCE. The tolerance or in- tolerance of trees is one of their most im-. PiG. 29.—A. small Ked Spruce in the Adiron- dack Mountains of New York. For many years thia tree stood under the dense cover of taller trees. During that time its bi-anches spread to the sides, hut it made scarcely any orowth in height. Then more light came to it, ]irobahly by the fall of some tall neighbor, and it began to recover its strength and grow much faster. The thin upper part of the crowu is where this faster height growth has been going on. portant silvicultural characters. Frequently it is the flrst thing a forester seeks to learn about them, because what he can safely. 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. Division of Forestry. Washington : G. P. O.
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