DIGITALNA ARHIVA ŠUMARSKOG LISTA
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ŠUMARSKI LIST 9-10/1989 str. 24     <-- 24 -->        PDF

STUDY OF THE INCREMENT OF IUFRO DOUGLAS FIR IN VARIOUS
PROVENANCES AT »CRNA LOKVA« EXPERIMENTAL PLOT
(BOSANSKA GRADIŠKA)


Summary


The height increment, diameter and quality of 8 Douglas Fir provenances
was studied at an experimental plot of IUFRO-Douglas Fir in various provenances
On the basis of the results of the investigation it can be concluded that
significant differences exist between provenances, but that, due to the uneven
growth, they become smaller with plant aging. In the same way significance
between the provenances changes. In spite of this it has been observed that in
view of the increment in height the most productive provenance is 1069, with
regard ito diameter provenance 1091 and regarding quality provenance 1060.
It we take into consideration both average height and quality, the 1036 provenance
is the most valauble, which originates from British Columbia (Canada).