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Abstract. Yields of sugar maple sap collected from three plastic pipeline systems by gravity, vacuum pump, and a vacuum pump with a transfer tank were compared during 2 years in northern Vermont.The transfer system yielded 27 percent more sap one year and 17 percent more the next year.Higher vacuum levels at the tapholes were observed in the transfer system.he transfer system yielded 27 percent more sap one year and 17 percent more the next year. Higher vacuum levels at the tapholes were observed in the transfer system.
An immense amount of sap is required to produce maple syrup, because the watery sap must be reduced to achieve the proper consistency and taste. Although the exact amount depends on the sweetness of the sap, in general it takes about 40 times as much maple sap to produce a portion of syrup.