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93 years of stand density and land-use legacy research at the Coulter Ranch Study Site

Sanchez-Meador, Andrew J. and Moore, Margaret M. (2008) 93 years of stand density and land-use legacy research at the Coulter Ranch Study Site. In: Fort Valley Experimental Forest - A Century of Research 1908-2008 Conference Proceedings (RMRS-P-53CD), August 7-9, 2008, Flagstaff, AZ.

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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.

Item Type: Conference or Workshop Item (Paper)
Publisher’s Statement: Published by US Forest Service.
Additional Information: More information on the Fort Valley Experimental Forest: http://www.rmrs.nau.edu/fortvalley/; Long Valley Experimental Forest: https://www.fs.fed.us/rmrs/experimental-forests-and-ranges/long-valley-experimental-forest
Keywords: Long-term research; Ponderosa pines (Pinus ponderosa); Range research; silviculture; Cultural resources; Fort Valley Experimental Forest; Long Valley Experimental Forest; Fort Valley Experiment Station; Density; ERI Library
Subjects: S Agriculture > SD Forestry
NAU Depositing Author Academic Status: Faculty/Staff
Department/Unit: Research Centers > Ecological Restoration Institute
Date Deposited: 26 May 2017 20:53
URI: http://openknowledge.nau.edu/id/eprint/2835

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