You are here: Home
/ Publication Information
Title: Estimating Defoliation of Hardwoods Using Blade-petiole Relations
Author: Valentine, Harry T.
Source: Res. Pap. NE-405. Broomall, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 5p.
Publication Series: Research Paper (RP)
Description: Prediction equations for estimating leaf blade area and dry weight from measurements of petiole thickness were used to estimate defoliation of Populus tremuloides, Acer rubrum, Quercus rubra, and Q. alba. On one tree of each species, a sample of leaves was artifically browsed in May and harvested in July. The fractions of leaf blade tissue remaining in the samples after treatment in May were compared to the fractions remaining after harvest in July, which were calculated using the blade-petiole relations. Significant differences were found between the fractions for all species except P. tremuloides. Late browsing treatments were applied to leaf samples of the same trees in July. Except for the remaining fraction of Acer rubrum blade dry weight, all fractions calculated after harvest in August were reasonably close to measured fractions after treatment, although some statistically significant differences were found.
- 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.
- This publication may be available in hard copy. Check the Northern Research Station web site to request a printed copy of this publication.
- Our on-line publications are scanned and captured using Adobe Acrobat. During the capture process some typographical errors may occur. Please contact Sharon Hobrla, email@example.com if you notice any errors which make this publication unusable.
XML: View XML
Valentine, Harry T. 1978. Estimating Defoliation of Hardwoods Using Blade-petiole Relations. Res. Pap. NE-405. Broomall, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 5p.
Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility