Variation of Sugar Maple Sap Yield and Its Influence on Experimental Design
Variation of Sugar Maple Sap Yield and Its Influence on Experimental Design

Author: Barton M. Blum

Publisher:

Published: 1968

Total Pages: 12

ISBN-13:

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S2When sap production research was begun by the Northeastern Forest Experiment Station in Burlington, Vermont, in 1964, it became apparent that more quantified information on sap yield variation among individual trees and among years was needed to facilitate the designing of efficient experiments. One of the first projects undertaken was to record seasonal sap yields on approximately 140 individual trees on a sugarbush near Jericho, Vermont. Yields were measured in the sap seasons of 1965, 1966, and 1967. Data presented in this report are based for the most part on a random sample drawn from these trees. All sample trees were tapped with two tapholes bored to a uniform depth.S3.

Sap Yields from Fall and Spring Tapping of Sugar Maple
Sap Yields from Fall and Spring Tapping of Sugar Maple

Author: Melvin Ray Koelling

Publisher:

Published: 1968

Total Pages: 12

ISBN-13:

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S2Some maple sap producers have wondered whether they could increase the total sap yields by tapping their trees not only in the spring but also in the fall too. Our research indicates that tapping in the fall cannot be recommended. Our study of fall tapping was begun in November 1964. Fall tapping was at least theoretically possible because temperature fluctuations like those of the normal spring tapping season occur to some extent in late fall and early winter. However, it was not known whether the volume and sugar concentration of fall-produced sap would be adequate to make such a practice feasible. Nor did we know whether fall tapping would affect the normal spring sap production from fall-tapped trees. The study reported here was set up to answer these questions. S3.