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Science 28 February 1964:
Vol. 143. no. 3609, pp. 963 - 964
DOI: 10.1126/science.143.3609.963
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Articles

Pure Maple Syrup: Nutritive Value

Albert L. Leaf 1

1 Department of Silviculture, State University College of Forestry, Syracuse University, Syracuse, New York

Variations in concentrations of sugar, nitrogen, phosphorus, potassium, calcium, and magnesium of sap from sugar maple (Acer saccharum, Marsh.) trees are related to the time of sap collection and result in variation of the same components in pure maple syrup. Thirty milliliters (one fluid ounce) of pure maple syrup may contain 3 to 6 mg of phosphorus, 10 to 30 mg of potassium, 40 to 80 mg of calcium, and 4 to 25 mg of magnesium.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)