Hi
The problem of sampling truck loads has been tested in some projects in
Sweden. I have myself been involved in one of the projects years ago.
I suggest you try to contact prof Mats Nylinder, Swedish University of
Agricultural Sciencies, S-750 07 UPPSALA, e-mail mats.nylinder@vl.slu.se. I
do not know, however, if he is using his e-mail.
Regards
Kjell Pernestal
>Forestry Corporation of New Zealand manages about 190,000 ha of radiata pine
>plantations.
>It produces about 1 million m3 of pulpwood each year from thinning and
>clearfelling.
>
>We need to be able to measure the changes in the basic density (Oven dry
>weight/cubic metre of wood)
>of the pulpwood over time, as it leaves the forest.
>
>We would like to take wood samples from truckloads of logs as they leave the
>forest,
>and do the density analysis on these samples.
>
>We are looking for a mechanical device which will take these samples. An
>increment borer
>is not a suitable tool because it doesn't sample the volume of the log in
>proportion to
>the radial variation in density in the log. Ideally the sample should be
>wedge-shaped and
>at right angles to the long axis of the log.
>
>An article by Torborjn Okstad in Forest Products Journal (20:8, 1970)
>describes a
>prototype machine which looked like a chainsaw and cut chips from a
>wedge-shaped section
>of the log.
>
>We would like to contact anyone who has had any experience or knowledge of
>such a tool and/or
>experience in sampling for basic density changes in the manner described.
>
>
>Jim Shirley
>Forest Resources & Valuation Mgr, Forestry Corporation of NZ Ltd, Rotorua,
>New Zealand
>Email : shirleyj@fcnz.co.nz, and shirleyj@poly.waiariki.ac.nz,
>
>
Kjell Pernestal /\
Dept Physics Dept Forest Survey //\\
GPO 530 //\\
S-751 21 UPPSALA S-901 83 UMEA ///\\\
Sweden Sweden ///\\\
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