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Estimation of volume, total and projected area of Scots pine needles from their regression on length

Flower-Ellis, Jeremy G.K. and Olsson, Leif (1993). Estimation of volume, total and projected area of Scots pine needles from their regression on length. Technical Report. Uppsala: UNSPECIFIED, Sveriges lantbruksuniversitet. Studia forestalia Suecica ; 190
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Abstract

Breadth, thickness, perimeter and area of serial transverse sections (TS) of Scots pine (Pinus sylvestris L.) needles from non-fertilised (0) and combined NPK-fertilised (F) and irrigated fertilised (IL) trees of northern Swedish origin were measured by projection microscopy. The accuracy and precision of the method were analysed. Regressions of the above characters and of total (A,) and projected (A,) area and volume on the length of single needles were calculated, to make possible their non-destructive estimation from length. Needles were semi-fusiform, rather than semi-cylindrical, as is assumed for some conversion factors from projected to total area. The assumption of a semi-cylindrical form caused total needle area to be systematically overestimated. The mean basic dimensions of the longer (F, IL) needles exceeded those of (0) needles: breadth by 11%, thickness by 21%, TS area by 32% and perimeter by 9%. Regressions of A, and A, on length were linear over the range 15-70 mm; that of volume was curvilinear. Both (0) and (F, IL) needles lay on the same regression line. Joint regressions gave estimates of mean A, mean A and mean volume having 95% confidence limits of (2.3, (2 .0 and (4.4%, respectively. Comparisons with published sources suggest that the regressions should be applicable outside the range of northern morphological types within Scandinavia, but that overestimates of area and volume may occur if they are applied to material of Central European origin.

Authors/Creators:Flower-Ellis, Jeremy G.K. and Olsson, Leif
Title:Estimation of volume, total and projected area of Scots pine needles from their regression on length
Series/Journal:Studia forestalia Suecica (0039-3150)
Year of publishing :1993
Number:190
Number of Pages:19
Place of Publication:Uppsala
Publisher:Faculty of Forestry, Swedish University of Agricultural Sciences
ISBN for printed version:91-576-4779-8
ISSN:0039-3150
Language:English
Publication Type:Report
Full Text Status:Public
Agris subject categories.:K Forestry > K11 Forest engineering
Subjects:Obsolete subject words > FORESTRY, AGRICULTURAL SCIENCES and LANDSCAPE PLANNING > Plant production > Plant breeding
Obsolete subject words > FORESTRY, AGRICULTURAL SCIENCES and LANDSCAPE PLANNING > Plant production > Forestry
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Forest Science
Keywords:Pinus sylvestris, needles, fertilised
URN:NBN:urn:nbn:se:slu:epsilon-9-7
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-9-7
ID Code:4061
Faculty:S - Faculty of Forest Sciences
Deposited By: Skogsbiblioteket Umeå
Deposited On:22 Feb 2010 00:00
Metadata Last Modified:16 Dec 2015 14:53

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