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mdash; In 1990 an evaluation was made of all 29 Danish provenance trials with oak. For the most part, north-European provenances have been used in these trials. The paper presents results from 2 provenance trials with respectively 20 and 25 provenances 25 years of age raised from seed. From these trials it can be seen that the provenances are divided into many distinctive ecotypes, and differ with regard to the time of flushing, volume yield, morphological characteristics, etc. High heritability values have been found for straightness, tree height and volume yield as well as for flushing, epicormics and axis formation.

Variation of growth in Danish provenance trials with oak (Quercus robur L and Quercus petraea Mattuschka Liebl)