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Sap Now or Sawlogs Later

Tapping trees has an impact on the value of those trees’ logs for lumber.

Publication:
Farming, the Journal of Northeast Agriculture
Date:
October 1, 2014

Sap Preheaters: Efficient Maple Syrup Processing

In 1974 the Vermont Experiment Station, Proctor Maple research team, and the Northeastern Forest Experiment Economics Research Unit at Burlington, VT, launched an intensive 4-year processing research program. This program was designed to accomplish two major goals: (1) increase the efficiency of the conventional open-pan evaporator system from approximately 65 percent to approximately 80 percent; and (2) evaluate new evaporator systems for processing maple syrup products. As an initial part of the first research objective, the energy balance of the conventional open-pan evaporator has been completed. Also, design and laboratory and field testing of a sap preheater system has been completed.

Date:
January 1, 1978

Sap Prices

Table presenting suggested prices per gallon for a maple producer to purchase sap.

Publication:
Maple Syrup Digest
Date:
June 1, 2016

Sap Value Calculator

Use this online calculator to determine the proper price to pay for sap.

Date:
October 1, 2018

Sap Yields from Fall and Spring Tapping of Sugar Maple

Some maple sap producers have wondered whether they could increase the total sap yields by tapping their trees not only in the sprint but also in the fall too. Our research indicates that tapping in the fall cannot be recommended.

Date:
January 1, 1968

Sap-Sugar Content of Forest Service Grafted Sugar Maple Trees

In March and April 1983, 289 and 196 young grafted sugar maple trees were tapped and evaluated for sap-sugar content. In April, sap was collected from taps both above and below the graft union. Diameter of all tapped trees at 18 inches above the ground was measured. Analysis of the data revealed that: (1) trees selected for high sugar yield cannot be reproduced by grafting on rootstock of unknown but varying sugar content without encountering large fluctuations in sap sweetness of the trees produced; (2) diameter is not correlated with sap sweetness of young grafted trees; (3) numerous sap-sugar readings over time may be necessary to identify the sap sugar characteristics of a candidate sweet tree; and (4) the cause of the variation in sap-sugar content of trees over time needs to be investigated more fully.

Date:
January 1, 1985

SapSpy keeps tabs on the sugarbush

During the 2021 season, the UVM Proctor Center tested SapSpy (www.sapspy.com), a relatively new entrant in the sugarbush monitoring field.

Publication:
Maple News
Date:
September 1, 2021