K. M. Bhat 
,
Matti Kärkkäinen
Variation in structure and selected properties of Finnish birch wood. IV.
Bhat K. M., Kärkkäinen M. (1981). Variation in structure and selected properties of Finnish birch wood. IV. Silva Fennica vol. 15 no. 1 article id 5096. https://doi.org/10.14214/sf.a15037
Abstract
Length variation of fibres and vessels was studied in the branches, stems and roots of Betula pendula Roth and B. pubescense Ehrh. The cells were significantly shorter in the branches and roots than in the stems. There was no significant difference in the cell length between the upper and lower radii of the branches and roots. The length increased from the pith to the surface and decreased in the branches and stems from the base onwards. In the roots the length increased in that direction. The differences between the tree species were small although the cells of B. pubescens were a little longer.
The PDF includes a summary in Finnish.
Keywords
Betula pendula;
Betula pubescens;
branches;
wood anatomy;
roots;
stem;
vessels;
fibres
Published in 1981
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