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Extension growth of young ash and sycamore grown in farm forestry in Co. Sligo is strongly affected by exposure. Ash is susceptible to terminal bud death resulting in much forking, thus the species requires regular pruning. It is suggested that:

a. ash and sycamore should not be planted in mixtures,

b. shelter (shelterbelts and/or nurse crops) should be provided,

c. ash requires regular pruning,

d. seed source of planting material needs to be altered, and

e. thinning regimes of ash and sycamore are species specific.

It is stressed that quality crops of ash and sycamore can only be achieved by careful silviculture (combination of shelter, weed control, formative pruning and thinning) in conjunction with the use of adequate planting material.

See publication below for full details:
Binggeli, P. and P. Blackstock (1999) Impact of exposure on extension growth and stem quality of young ash and sycamore in farm forestry plantations. Agroforestry Forum 9(3), 19-23.

Fraxinus excelsior plantation near Sligo (north-west Ireland). The trees are growing rapidly but have poor stem shape with extensive forking. (73080 bytes)

Fraxinus excelsior poor stem shape with extensive forking. (68982 bytes)

     
    Copyright © 1999 Pierre Binggeli. All rights reserved.