Abstract
Measurement of component widths of annual rings by binocular microscope and of densities by X-ray methods have increased the accuracy of estimation of effects of various factors on tree growth. Sources of information and examples of uses of tree-ring analyses are discussed. Measurements of latewood and earlywood components of tree rings are used to illustrate longterm trends and annual variations about them. It is concluded that foresters should study component widths and densities of tree rings in order to learn more about manipulation of tree growth toward desired goals.
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