. Principles of American forestry . Forests and forestry. 4 PEINCIPLES OF AMEEICAN FORESTKY. and Scarlet Oaks, which often have a tap-root extending four feet in depth before the tree has attained a correspond- ing height above ground, but after about five years large lateral roots develop and the growth of the tap-root nearly ceases. Root-growth is relatively less to the extent of ground. Fig. 2.—Characteristic Root Formation. On the left two Hack- berry, on tlie right two White Birch, each two-year seedlings from same seed-bed; the first with a divided tap-root, the second without tap-root.
. Principles of American forestry . Forests and forestry. 4 PEINCIPLES OF AMEEICAN FORESTKY. and Scarlet Oaks, which often have a tap-root extending four feet in depth before the tree has attained a correspond- ing height above ground, but after about five years large lateral roots develop and the growth of the tap-root nearly ceases. Root-growth is relatively less to the extent of ground. Fig. 2.—Characteristic Root Formation. On the left two Hack- berry, on tlie right two White Birch, each two-year seedlings from same seed-bed; the first with a divided tap-root, the second without tap-root. occupied in moist and fertile soil than in dry and poor soil, but the roots are proportionately more branched. In wet seasons the root development is less for a given plant than in dry seasons, because the roots may get their needed food and water from a small area. Nursery trees gi-own on moist rich land have a more compact root system than those grown on poor land. At the Minnesota Experiment Station a small Bur Oak. 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 Green, Samuel B. (Samuel Bowdlear), 1859-1910. New York, J. Wiley & Sons
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectforestsandforestry
