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Nitrogen Fertilizer Response of Rocky Mountain Douglas-Fir by Geographica Area Across the Inland Northwest Item Info

Response to nitrogen fertilization treatments differed significantly among geographic regions. Gross basal area andvolume growth on fertilized plots were significantly greater than growth on controls for all geographic regions, but only in northern Idaho and central Washington was gross response significantly greater on 400 lbs./a. N plots than on 200 lbs. N plots. Net basal area and volume growth on treated plots in Montana, central Idahoand northeast Oregon were not significantly greater than the controls for either nitrogen treatment. Analysis of two year periodic basal area increment indicated that, while response did decline through time, treated plots continued to produce more gross growth than control plots six years after treatment. Similar operational nitrogen treatments applied to the Douglas-fir population sampled in this study should produce gross responses exceeding ten percent after six years three out of four times.

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Title:
Nitrogen Fertilizer Response of Rocky Mountain Douglas-Fir by Geographica Area Across the Inland Northwest
Creator:
J. A. Moore, P. Mika, J. Vander Ploeg
Date Created (ISO Standard):
1991
Description:
Response to nitrogen fertilization treatments differed significantly among geographic regions. Gross basal area andvolume growth on fertilized plots were significantly greater than growth on controls for all geographic regions, but only in northern Idaho and central Washington was gross response significantly greater on 400 lbs./a. N plots than on 200 lbs. N plots. Net basal area and volume growth on treated plots in Montana, central Idahoand northeast Oregon were not significantly greater than the controls for either nitrogen treatment. Analysis of two year periodic basal area increment indicated that, while response did decline through time, treated plots continued to produce more gross growth than control plots six years after treatment. Similar operational nitrogen treatments applied to the Douglas-fir population sampled in this study should produce gross responses exceeding ten percent after six years three out of four times.
Subjects:
Forest Nutrition Forest Fertilization Forest soils Douglas-fir Growth Response Nutrient cycles Forest ecology Forest Fertilization Conifer Pesudotsuga menziesii Douglas-fir Forest Nutrition
Source:
P. Mika et al., Nitrogen Fertilizer Response of Rocky Mountain Douglas-fir by Geographic Are Across the Inland Northwest. 5pp.
Source Identifier:
1991_Moore_ et.al1991_ N Fertilizer response of Rky Mnt DF_Geography.pdf
Type:
Text
Format:
application/pdf

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Preferred Citation:
"Nitrogen Fertilizer Response of Rocky Mountain Douglas-Fir by Geographica Area Across the Inland Northwest", Intermountain Forestry Cooperative, University of Idaho Library Digital Collections, https://www.lib.uidaho.edu/digital/iftnc/items/iftnc3353.html
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Rights:
This document is provided by the University of Idaho Library for use by University of Idaho students, staff, and faculty. All rights to the document linked from this metadata belong to the author, rights holder, and/or provider. For more information contact The Intermountain Forestry Cooperative, https://www.uidaho.edu/cnr/ifc
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http://rightsstatements.org/vocab/InC-EDU/1.0/
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