30 percent). Damage incidence observed during "leaf-on" varied by forest type. Incidence of damage-free trees decreased with increasing tree size class and with increasing position in the canopy. Incidence of "decline-associated" damage increased with increased size and increased position in the canopy."> Use of USDA forest inventory and analysis data to assess oak tree health in Minnesota

Publication Details

Use of USDA forest inventory and analysis data to assess oak tree health in Minnesota

Publication Toolbox

  • Download PDF (253443)
  • This publication is available only online.

Year Published

2003

Publication

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: 518-526

Abstract

As a precursor to a regional assessment for the Upper Midwest, three variables were examined as measures of oak health in Minnesota between 1974 and 1990 using USDA Forest Service Inventory and Analysis data. Mortality was < 1 percent in the 1974-1977 inventory, but > 6 percent in the 1986-1990 inventory based on numbers of dead oaks per total oaks on plots with ≥ 25 percent oak in three forest types. Over two-thirds of the oaks measured during "leaf-on" period in both cycles were in relatively good condition based on live crown ratio (value > 30 percent). Damage incidence observed during "leaf-on" varied by forest type. Incidence of damage-free trees decreased with increasing tree size class and with increasing position in the canopy. Incidence of "decline-associated" damage increased with increased size and increased position in the canopy.

Note: This article is part of a larger document. View the larger document

Citation

Kromroy, Kathryn W.; Juzwik, Jennifer; Castillo, Paul D. 2003. Use of USDA forest inventory and analysis data to assess oak tree health in Minnesota. 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: 518-526

Last updated on: January 30, 2007