Effect of Vacuum Pumping on Lateral Movement of Sap in the Maple Tree Bole PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Effect of Vacuum Pumping on Lateral Movement of Sap in the Maple Tree Bole PDF full book. Access full book title Effect of Vacuum Pumping on Lateral Movement of Sap in the Maple Tree Bole by Barton M. Blum. Download full books in PDF and EPUB format.
Author: Barton M. Blum Publisher: ISBN: Category : Sap Languages : en Pages : 14
Book Description
S2Our recent studies of maple sap production have shown that invented tubing collection systems yield more sap than vented tubing systems, and that these increases are related to natural vacuum that develops in the unvented systems. Application of additional vacuum with a vacuum pump produced a further increase in sap yield. In these studies we used a paired-taphole type of experimental design. Two tapholes were drilled 6 inches apart on the same tree; one taphole of each pair received one treatment (vacuum) while the other was a control (no vacuum).S3.
Author: Barton M. Blum Publisher: ISBN: Category : Sap Languages : en Pages : 14
Book Description
S2Our recent studies of maple sap production have shown that invented tubing collection systems yield more sap than vented tubing systems, and that these increases are related to natural vacuum that develops in the unvented systems. Application of additional vacuum with a vacuum pump produced a further increase in sap yield. In these studies we used a paired-taphole type of experimental design. Two tapholes were drilled 6 inches apart on the same tree; one taphole of each pair received one treatment (vacuum) while the other was a control (no vacuum).S3.
Author: Barton M. Blum Publisher: ISBN: Category : Maple syrup Languages : en Pages : 18
Book Description
S2In the spring of 1967, a vacuum pump was installed at a sugarbush located in Underhill, Vermont. This work proceeded in two phases: an individual-tree study designed to determine if sap could be drawn out of a tree in sufficient quantities to account for large yield differences; and a large-scale study of the effects of sustained levels of vacuum on yields from a nearly commercial-size network of tubing. S3.
Author: United States. Superintendent of Documents Publisher: ISBN: Category : Government publications Languages : en Pages :
Book Description
February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index
Author: Elwood L. Shafer Publisher: ISBN: Category : Recreational surveys Languages : en Pages : 420
Book Description
S2Because of the great and growing interest in outdoor recreation, many studies are being made by private and public agencies that need information for planning use of land and facilities for recreational purposes. In these studies much attention is being given to the people who use recreational facilitieswho they are; where they come from; what they like; what they want; how much they are willing to spend. Many types of surveys are being used in studying these people. The main question in planning a survey of this sort is: What survey technique can be used that will provide the most reliable and valid results at the least cost? To get an answer that we could use in our recreation research program, we made a study of four different survey techniquesa personal interview, a handout questionnaire, an immediate mail questionnaire, and a delayed mail questionnaire. Results show that the delayed mail survey, conducted 3 months after the camping experience, gets the best results at the least cost. Our study is described here for the benefit of other research workers in outdoor recreation.S3.
Author: Barton M. Blum
Author: Barton M. Blum
Author: 
Author: Barton M. Blum
Author: Northeastern Forest Experiment Station (Radnor, Pa.)
Author: United States. Superintendent of Documents
Author: 
Author: Elwood L. Shafer
Author: United States. Superintendent of Documents
Author: 
Author: Northeastern Forest Experiment Station (Radnor, Pa.)