Forest establishment quality assurance

Authors: Robin Trewin
Publication: New Zealand Journal of Forestry, Volume N.Z.J.For. 2016, Issue N.Z.J.For. 61(1) 2016, pp 39-40, May 2016
Publisher: New Zealand Institute of Forestry

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Abstract: Introduction The back cover on the November 2015 issue of this Journal shows a tree planter at work and he is making some mistakes. It is hoped that this article will be in good time for the 2016 plantings and will raise awareness of the importance of Quality Assurance Indicator Plots in controlling planting operations (Trewin & Cullen, 1985). Quality Assurance Indicator Plots Studies and records of planting quality in Quality Assurance Indicator Plots (Trewin, 2005) have revealed problems in recruiting, training and retaining planters. Of most concern was that despite traditional random checks by gang leaders and forest company supervisors, with follow-up checks by separate company employed personnel, percentages of acceptable planting quality were poor: • Fault-free planting was very low at 13.50% – roots well positioned in cultivated ground and firmed-in at a depth >10 cm • Good planting was 29.70% – most roots orientated down at a depth >10 cm • Poor planting was 27.60% – poor cultivation, roots up at a depth <10 cm • Bad planting was 13.50% – no slash removal or cultivation with all roots up • Very bad planting 15.70% – no slash removal or cultivation, slit planting with some thrust up unburied roots.

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