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Nitrogen and Potassium Concentrations after Fertilization on Mixed Conifer Stands in North Central Washington Item Info

Post fertilization foliar nitrogen and potassium concentrations and needle weights were examined for Douglas-fir (Pseudotsuga menzeisii), lodgepole pine (pinus contorta) and ponderosa pine (pinus ponderosa) in north central Washington. Foliar nitrogen concentration was found to increase and foliar potassium concentration to remain the same or decrease following fertilization. Lodgepole pine showed the most efficient uptake for both nitrogen and potassium. Potassium to nitrogen ratios decreased following treatment. Needle weights for lodgepole pine increased following fertilization. Foliar magnesium, boron, iron and zinc levels were also examined for lodgepole pine and ponderosa pine occurring on pumice soils versus glacial till soils. Response to treatment varied widely, but expected nutrient deficiencies due to pumice soils did not materialize except for lodgepole pine magnesium levels on untreated plots. Boron and iron showed unexpected increases on pumice soils following combined nitrogen and potassium treatment, leading us to suspect that some other soil layer may underlie the pumice soil.

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Title:
Nitrogen and Potassium Concentrations after Fertilization on Mixed Conifer Stands in North Central Washington
Creator:
Garrison, M.T.; Moore, J.A.
Date Created (ISO Standard):
1995-04-01
Description:
Post fertilization foliar nitrogen and potassium concentrations and needle weights were examined for Douglas-fir (Pseudotsuga menzeisii), lodgepole pine (pinus contorta) and ponderosa pine (pinus ponderosa) in north central Washington. Foliar nitrogen concentration was found to increase and foliar potassium concentration to remain the same or decrease following fertilization. Lodgepole pine showed the most efficient uptake for both nitrogen and potassium. Potassium to nitrogen ratios decreased following treatment. Needle weights for lodgepole pine increased following fertilization. Foliar magnesium, boron, iron and zinc levels were also examined for lodgepole pine and ponderosa pine occurring on pumice soils versus glacial till soils. Response to treatment varied widely, but expected nutrient deficiencies due to pumice soils did not materialize except for lodgepole pine magnesium levels on untreated plots. Boron and iron showed unexpected increases on pumice soils following combined nitrogen and potassium treatment, leading us to suspect that some other soil layer may underlie the pumice soil.
Subjects:
research forest management fertilizer timber (lumber)
Source:
Garrison, M.T., and J.A. Moore. 1995. Nitrogen and Potassium Concentrations after Fertilization on Mixed Conifer Stands in North Central Washington. FWR, Univ. of Idaho, Moscow, 36+ 20 appendix pages.
Source Identifier:
Nitrogen_and_Potassium_Concentrations_After_Fertilization_on_Mixed_Conifer_Stands_in_NCWashington_IFTNC_1995
Type:
Text
Format:
application/pdf

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"Nitrogen and Potassium Concentrations after Fertilization on Mixed Conifer Stands in North Central Washington", Intermountain Forestry Cooperative, University of Idaho Library Digital Collections, https://www.lib.uidaho.edu/digital/iftnc/items/iftnc4782.html
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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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