Abstract
SUMMARY Pruning studies in a young radiata pine (P. radiata D.Don) plantation in New South Wales have been carried through to the first thinning. Loss of basal area growth due to early low pruning, as reported earlier, continued. The stands were thinned at age 17 years to a prescription of 110 square feet per acre of basal area. The basal area after thinning was found to vary with basal area prior to thinning and to be related to the pruning treatments. Pruning of more than one third of green crown when mean stand height was less than 30 feet resulted in restricted selection of useful stems for retention, and the low basal areas after thinning.
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