Early results of ash (Fraxinus excelsior L.) provenance trials at sites in England and Wales

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Abstract
The early growth of British and continental European provenances of common ash, Fraxinus excelsior L., was compared in the nursery and in field trials at six sites. There were significant differences in height between provenances in the nursery. Up to 4 years from sowing differences in height between the provenances remained highly significant. There was a considerable range of vigour amongst British provenances. Four ash provenances from eastern Europe performed relatively poorly at all sites and it is suggested that such material should not be planted in Britain. Provenances from France generally showed good early growth. Interactions between provenances and sites were identified at this early stage and the practical implications of these are examined. The implications of the results for the production of improved ash planting stock are discussed.

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