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Glaze Damage in the Birch-Beech-Maple-Hemlock Type of Pennsylvania and New York

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The glaze storm of March 17-19, 1936, damaged the forest on six million acres in Pennsylvania and New York. Immediate losses of forest products will be considerable due to the inability of the market to absorb all salvageable material before it decays. Future losses will take the form of decreased volume growth, resulting from destruction of crowns and opening the stand to soil desiccation; and decreased quality growth, resulting from deformity, ravages of rot and insects, and entrance of weed trees into the stands. Tables and graphs show that damage increases with increase in size of tree; in age of the stand; and in elevation of the site. Southerly aspects suffered less than northerly ones. Because of their greater flexibility and manner of growth conifers as a whole were more resistant to glaze injury than hardwoods. The existing situation should be met by immediate salvage of damaged trees, and stand sanitation to minimize future losses. Measures to lessen damage from future glaze storms are synonymous with good silviculture, and the maintenance of a larger proportion of conifers where practicable.
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Document Type: Journal Article

Affiliations: U. S. Department of Agriculture at Philadelphia, Pa., Allegheny Forest Experiment Station

Publication date: 01 January 1938

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