Ponderosa pine needle length: an early indicator of release treatment effectiveness

Growth responses of ponderosa pine seedlings range from fast to slow after release and often demonstrate the effectiveness of the prescribed treatments. Although several morphological parameters have have identified as being sensitive to competition, no link to future growth and treatment effectiven...

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Published inCanadian journal of forest research Vol. 22; no. 5; pp. 761 - 764
Main Authors McDonald, P.M, Skinner, C.N, Fiddler, G.O
Format Journal Article
LanguageEnglish
Published 01.05.1992
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Abstract Growth responses of ponderosa pine seedlings range from fast to slow after release and often demonstrate the effectiveness of the prescribed treatments. Although several morphological parameters have have identified as being sensitive to competition, no link to future growth and treatment effectiveness has been made. Shrubs and grasses in four 1- to 3-year-old ponderosa pine (Pinus ponderosa Dougl. ex Laws. var. ponderosa) plantations in northern California were treated by several manual and chemical release techniques that resulted in differing amounts of competition to ponderosa pine seedlings. Differing amounts of competition in turn affected pine growth and led to a wide range of stem heights, diameters, and needle lengths. Correlation coefficients indicated that 1 year-old needles. measured 2-4 years after treatment, were positively associated with pine height and diameter up to 7 years after treatment and potentially beyond. Consequently, length of 1-year-old needles may provide a useful early indication of longer term treatment effectiveness.
AbstractList Growth responses of ponderosa pine seedlings range from fast to slow after release and often demonstrate the effectiveness of the prescribed treatments. Although several morphological parameters have have identified as being sensitive to competition, no link to future growth and treatment effectiveness has been made. Shrubs and grasses in four 1- to 3-year-old ponderosa pine (Pinus ponderosa Dougl. ex Laws. var. ponderosa) plantations in northern California were treated by several manual and chemical release techniques that resulted in differing amounts of competition to ponderosa pine seedlings. Differing amounts of competition in turn affected pine growth and led to a wide range of stem heights, diameters, and needle lengths. Correlation coefficients indicated that 1 year-old needles. measured 2-4 years after treatment, were positively associated with pine height and diameter up to 7 years after treatment and potentially beyond. Consequently, length of 1-year-old needles may provide a useful early indication of longer term treatment effectiveness.
Author Skinner, C.N
McDonald, P.M
Fiddler, G.O
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Snippet Growth responses of ponderosa pine seedlings range from fast to slow after release and often demonstrate the effectiveness of the prescribed treatments....
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StartPage 761
SubjectTerms conifer needles
diameter
growth rate
height
length
Pinus ponderosa
plant characteristics
plant competition
release
seedlings
Title Ponderosa pine needle length: an early indicator of release treatment effectiveness
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