Effect of vacuum pumping on lateral movement of sap in the maple tree bole
By: by Barton M. Blum and Melvin R. Koelling.
Contributors: Koelling, Melvin R. 1937-
Series: Research paper NE -- 107.
Publisher: Northeastern Forest Experiment Station, Forest Service, U.S. Dept. of Agriculture
Published: 1968
Place of publication: Upper Darby, Pa
Language: eng
Subjects: Sugar maple -- Physiology; Sap
Notes: Cover title.

Includes bibliographical references.