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Title: 93 years of stand density and land-use legacy research at the Coulter Ranch Study Site (P-53)

Author: Meador, Andrew J. Sanchez; Moore, Margaret M.;

Date: 2008

Source: In: Olberding, Susan D.; Moore, Margaret M., tech coords. Fort Valley Experimental Forest - A Century of Research 1908-2008. Conference Proceedings; August 7-9, 2008; Flagstaff, AZ. Proceedings RMRS-P-53CD. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. p. 321-330

Publication Series: Proceedings (P)

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

Description: In 1913, the Fort Valley Experimental Forest initiated an unprecedented case-study experiment to determine the effects of harvesting methods on tree regeneration and growth on a ponderosa pine-Gambel oak forest at Coulter Ranch in northern Arizona. The harvesting methods examined were seed-tree, group selection, and light selection. In addition, the effects of livestock grazing (excluded or not) were examined. We revisited the Coulter Ranch Study Site to examine the effects of these treatments on historical (1913) and contemporary (2003-2006) stand density and tree size. The key finding was that while initial 1913 harvests reduced average pine density by one- to two-thirds, tree densities increased from three to nine times those prior to harvest over the 93-year period. The greatest increase was in the seed-tree method.

Keywords: long-term research, ponderosa pine, range research, silviculture, cultural resources, Fort Valley Experimental Forest, Long Valley Experimental Forest, http://www.rmrs.nau.edu/fortvalley/

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Meador, Andrew J. Sanchez; Moore, Margaret M. 2008. 93 years of stand density and land-use legacy research at the Coulter Ranch Study Site. In: Olberding, Susan D.; Moore, Margaret M., tech coords. Fort Valley Experimental Forest - A Century of Research 1908-2008. Conference Proceedings; August 7-9, 2008; Flagstaff, AZ. Proceedings RMRS-P-53CD. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. p. 321-330

 


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