Title: Legume ground covers alter defoliation response of black walnut saplings to drought and anthracnose
Author: Van Sambeek, J. W.;
Source: In: Van Sambeek, J. W.; Dawson, Jeffery O.; Ponder Jr., Felix; Loewenstein, Edward F.; Fralish, James S., eds. Proceedings of the 13th Central Hardwood Forest Conference; Gen. Tech. Rep. NC-234. St. Paul, MN: U.S. Department of Agriculture, Forest Service, North Central Research Station: 556-564
Publication Series: General Technical Report (GTR)
Description: Growth and premature defoliation of black walnut saplings underplanted 5 or 6 years earlier with six different ground covers were quantified in response to a summer drought or anthracnose. Walnut saplings growing with ground covers of hairy vetch, crownvetch, and to a lesser extent sericea lespedeza continued to have more rapid height and diameter growth than saplings in resident vegetation. Walnut saplings in a dense cover of sericea lespedeza had more rapid defoliation during a summer drought than saplings growing in a ground cover of resident vegetation. During the following year with nearly normal precipitation, walnut saplings growing in ground covers of resident vegetation had more rapid defoliation than walnut saplings underplanted with hairy vetch, crownvetch, and sericea lespedeza. Walnut saplings that had been underplanted with annual legumes that had failed to reseed themselves (crimson clover or Korean lespedeza) had defoliation rates similar to walnut saplings in resident vegetation. Regression analysis with a full first and second-order polynomial indicated that approximately 50 to 70 percent of the variation in the subsequent annual growth increment was a function of premature defoliation and sapling stem diameter, trunk cross-sectional area, or stem volume.
- 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
Van Sambeek, J. W. 2003. Legume ground covers alter defoliation response of black walnut saplings to drought and anthracnose. In: Van Sambeek, J. W.; Dawson, Jeffery O.; Ponder Jr., Felix; Loewenstein, Edward F.; Fralish, James S., eds. Proceedings of the 13th Central Hardwood Forest Conference; Gen. Tech. Rep. NC-234. St. Paul, MN: U.S. Department of Agriculture, Forest Service, North Central Research Station: 556-564
Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility