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Forest fertilization for enhancing tree growth and improving the value of harvested timber has been an effective silvicultural practice in the Inland Northwest forests. Early large scale study trials were installed in 1980, 1981 and 1982 to study the effects of nitrogen fertilization on forest nutrition, growth and survival of second-growth, even-aged Rocky Mountain Douglas-fir. A total of 98 research sites located across six ecologically diverse geographic regions throughout the Intermountain Northwest were respectively monitored for twelve, fourteen and sixteen years after establishment. Subsequent evidence from the Douglas-fir trials suggested that elements other than nitrogen, particularly potassium, may be limiting on some forest site types and may have significant influence on forest health. In response, a subset of the original trials was retreated in 1987 and 1988 with nitrogen and/or nitrogen plus potassium treatments. Technical and refereed documents include initial establishment and growth responses. Additional documentation is also presented for the 1987 and 1988 retreatment.

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Title:
IFTNC - Technical Document Report: Part I
Creator:
IFTNC
Date Created (ISO Standard):
1993-04
Description:
Forest fertilization for enhancing tree growth and improving the value of harvested timber has been an effective silvicultural practice in the Inland Northwest forests. Early large scale study trials were installed in 1980, 1981 and 1982 to study the effects of nitrogen fertilization on forest nutrition, growth and survival of second-growth, even-aged Rocky Mountain Douglas-fir. A total of 98 research sites located across six ecologically diverse geographic regions throughout the Intermountain Northwest were respectively monitored for twelve, fourteen and sixteen years after establishment. Subsequent evidence from the Douglas-fir trials suggested that elements other than nitrogen, particularly potassium, may be limiting on some forest site types and may have significant influence on forest health. In response, a subset of the original trials was retreated in 1987 and 1988 with nitrogen and/or nitrogen plus potassium treatments. Technical and refereed documents include initial establishment and growth responses. Additional documentation is also presented for the 1987 and 1988 retreatment.
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:
IFTNC, 1993. Intermountain Forest Tree Nutrition Cooperative, Research Study - Douglas-fir Forest Fertilization and Growth Response, Technical Report: Part I, University of Idaho, Moscow, Idaho, 148p.
Source Identifier:
1993_IFTNC. 1993.Technical Documentation Report Part I Statistical Analy. FWR, Univ. of Idaho, Moscow..pdf
Type:
Text
Format:
application/pdf

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Preferred Citation:
"IFTNC - Technical Document Report: Part I", Intermountain Forestry Cooperative, University of Idaho Library Digital Collections, https://www.lib.uidaho.edu/digital/iftnc/items/iftnc3334.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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