Skip to Main Content
Weight distribution in the current annual twigs of barclay willow.Author(s): John F. Thilenius
Source: Res. Note PNW-RN-472. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research. 10 p
Publication Series: Research Note (RN)
Station: Pacific Northwest Research Station
Download Publication (434 KB)
DescriptionThe current annual twigs of unbrowsed Barclay willow (Salix barclayi Anderss.) grow as gently tapering cylinders. Consequently, the distal half of the twig has only 33 to 41 percent of the total weight. Longer twigs have proportionally less weight in the distal end. The total weight of an unbrowsed twig can be estimated by simple regression of weight on an independent variable that approximates the volume of the twig (diameter of the twig immediately above the most recent bud scar times total length of the twig). Simple regression can also be used to estimate the weight of twig removed by browsing. The best estimator of weight of twig removed is an independent variable that approximates the volume of the twig left attached to the plant (diameter of the twig at the point of browsing times length of twig remaining).
- Visit PNW's Publication Request Page to request a hard copy of this publication.
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationThilenius, John F. 1988. Weight distribution in the current annual twigs of barclay willow. Res. Note PNW-RN-472. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research. 10 p
KeywordsBarclay willow, current annual twigs, browse, weight estimation, browsing
- Influence of flooding duration on the biomass growth of alder and willow.
- Migration of the Willow Flycatcher along the Middle Rio Grande
- Selecting and utilizing Populus and Salix for landfill covers: implications for leachate irrigation
XML: View XML