Articles
FORESTRY EXPERIENCES ON THE DOUBLE USE OF EUROPEAN WALNUTS
For this purpose an experimental stand of 0.8 ha was established by direct sowing in holes at a spacing of 3 x 3 m in NE-Hungary.
Seeds were collected from varieties producing cylindrical branchless boles at least 2.0–2.5 m in length.
The stand was inventorized at age nine by measuring the DBH, total height and branchless height of each tree.
Then, it was determined the total basal area, the wood volume per hectare and the volume of the average tree of the stand.
For comparison various walnut stands, the same data were measured and calculated in and for a horticultural plantation established at a spacing of 8 x 10 m in 1977/1978, and in a row of trees of forty years old planted at a spacing of 10 m between the stems.
For making the comparison of the data of walnut stands with those of oak stands possible, inventory of a young pedunculate oak stand and two older stands of this species was also performed.
Based on the results of the comparison both of the young and old stands, it could be stated that establishment of European walnut stands for forestry purpose is reasonable considering first of all the high world market price of walnut veneer log and sawlog.
In addition, the nut yield, though is expected in a smaller quantity is not negligible either.
However, for developing more exact technology for growing European walnut stands of double use, primarily for forestry purpose, much research work is still to be done.