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Some Long-Time Effects of Fertilization on Red Pine Plantations

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Recent mensurational data obtained from fertilized and unfertilized plots of 30- to 35-year-old red pine plantations supported by coarse outwash sand has demonstrated that very highly significant responses in increased total height and internodal growth, increased basal area, and decreased number of live whorls on dominant trees has resulted from potassium fertilization. Maximum height growth response was attained in the fifth or sixth year followed by a slight decrease in response which is still 45 percent above unfertilized trees 20 years after fertilization. It is postulated that the longevity of response to potassium is due to the combination of a site inherently low in productivity plus a history of severe degradation by exploitive agriculture.

Document Type: Journal Article

Affiliations: Associate Professor of Silviculture of the State University College of Forestry at Syracuse University, Syracuse 10, New York

Publication date: March 1, 1964

More about this publication?
  • Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
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