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By Heiberg S. O.   Leyton L.   Loewenstein H.  

Forest Science, Vol. 5, Iss. 2, 1959-06 ,pp. : 142-153

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Rubidium content of plants, fungi and animals closely reflects potassium and acidity conditions of forest soils

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Foliage Color and Nutrient Levels

By Blinn Charles R.   Buckner Edward R.  

Journal of Forestry, Vol. 85, Iss. 5, 1987-05 ,pp. : 48-49

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Estimation of the Amount of Foliage of Trees and Stands

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