layering
The Columbia Encyclopedia, Sixth Edition | Date: 2008
layering horticultural practice of propagating a plant by rooting a branch before severing it from the mother plant. Typically the branch is bent and a section that has been slit or broken on the underside is covered with soil and held in place by means of stakes or pins. Trench layering induces new shoots from a length of buried branch. In mound, or stool, layering, the many shoots of a closely cropped young plant are heaped with soil. Air (or pot, or Chinese) layering is used when the branch cannot be bent to the ground; peat moss or some other suitable rooting medium is attached to a cut place on the branch. Layering is used mostly for multiplying plants not easily propagated from cuttings. Some plants propagate naturally by layering, e.g., raspberries, strawberries, and chrysanthemums.
Bibliography: See bulletins of the U.S. Dept. of Agriculture; H. T. Hartmann, Plant Propagation (1968).
Author not available, LAYERING.,
The Columbia Encyclopedia, Sixth Edition 2008
The Columbia Encyclopedia, Sixth Edition. Copyright 2008 Columbia University Press
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Related entries from encyclopedias, dictionaries, and thesauruses
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layering
Britannica Concise Encyclopedia
... rooted portion of the plant. For soil layering, lower stems are bent to the ground and ... with moist soil of good quality. For air layering, a branch is deeply slit and the wound ... branch is then severed and transplanted. Layering was practiced by the ancient Egyptians ...
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stratification
Britannica Concise Encyclopedia
Layering that occurs in most sedimentary rock s and in igneous rock s that are formed at the Earth's surface, such as from lava flows and ...
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gneiss
World Encyclopedia
gneiss Metamorphic rock with a distinctive layering or banding. The darker minerals are likely to be hornblende, augite, mica, or dark feldspar. Before metamorphism, gneiss was an igneous rock , possibly a granite.
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shale
World Encyclopedia
shale Common sedimentary rock formed from mud or clay. Characterized by very fine layering, it may contain various materials such as fossils, carbonaceous matter and oil.
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felting
Britannica Concise Encyclopedia
... raw wool ) by subjecting it to moisture, heat, friction, and pressure. Sheep hair have scales that open somewhat when wet; layering hairs in a parallel fashion and applying some form of agitation cause the hairs to tighten together in a solid mat. The result ...
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