. Bulletin. Forests and forestry -- United States. 32 A PRIMER OF FORESTRY. queutly those on the lower and inner parts of the crown are more vigorous, x^lentifulj and persistent than is the case with intoler- ant trees. Thus the crown of a tolerant tree in tlie forest is usually denser and longer than tliat of one wiiich bears less shade,. It is usually true tliat 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 silv
. Bulletin. Forests and forestry -- United States. 32 A PRIMER OF FORESTRY. queutly those on the lower and inner parts of the crown are more vigorous, x^lentifulj and persistent than is the case with intoler- ant trees. Thus the crown of a tolerant tree in tlie forest is usually denser and longer than tliat of one wiiich bears less shade,. It is usually true tliat 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 Fig. 29.—A. small Ked Spruce in the Adiron- dack Mountains of New York. For many this tree stood under the dense cover of taller trees. During that time its branches spread to tlie sides, but it made scarcely any growth in heijrht. Then more liglit came to it, ]irobably by the full of some tall neighbor, and it began to recover its strength and grow much faster. The thin upper part of tbe toleraUCC of trCCS iS crown is where this faster height growth lias tol:erance and in- tolerance. The tolerance or in- been going on. one of their most im- 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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