Tillväxthastighet och storleksfördelning hos hassel (Corylus avellana)
To increase the knowledge about the growth of hazel (Corylus avellana)and size distribution of the shoots, circumference and stem diameter wasmeasured in a total of 54 clones in two areas in Östergötland. Further, thewidth of growth rings was determined for separate years. The diameter ofthe stems was measured both out from the centre of the stem andperpendicular to the first measure. The stems showed only a weaktendency to have an oval shape (with the longest side outwards from thecentre). The growth model did not improve when the degree of sunlightof clones was taken into the account. Therefore it is possible to use asimple and general growth model for the shoots of hazel. Such a modelwas then used to estimate the age of hazel from the diameter of the clone.