Diagnosing Potassium Deficiency in American Elm, Silver Maple, Russian Olive, Hackberry, and Box Elder
Abstract:Ulmus americana, Acer saccharinum, Elaeagonus angustifolia, Celtis occidentalis, and Acer negundo were grown in solutions containing +K+Na, -K+Na, +K-Na, -K-Na. In addition Ulmus americana seedlings were grown at all possible combinations of +K or -K and three levels of P. The -K seedlings grew less; their old leaves became necrotic and their young leaves, chlorotic. The leaf discolorations and reduced growth were associated with definite low concentrations of K in the leaves. Na and P concentrations in the supply or in the leaves did not affect deficiency, except that plants supplied low P had no terminal chlorosis. The origins of the terminal chlorosis are discussed.
Document Type: Journal Article
Affiliations: Asst. Prof., School of Forestry, Univ. of Minn.
Publication date: 1965-09-01
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- 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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