Graduate Thesis Or Dissertation
 

An economic analysis of final log manufacturing locations in the steep terrain radiata pine plantations of New Zealand

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  • Over the next quarter century there will be about an eight-fold increase in the volume of wood harvested annually from New Zealand's steep terrain radiata pine plantations. With the move to steeper terrain it is expected that there will be a trend towards considerably smaller landings. With smaller landings final log manufacture could have to take place at alternative locations to the large landings normally used. The locations examined in this thesis were: at the stump, at a landing, and at a central processing yard. Comparisons were made on the basis of value recovery, harvesting productivity and costs, and land taken out of production by landings. A field trial indicated that value recovery at the landing was better than at the stump but the magnitude of difference was dependent on individual log manufacturers. Better value recovery on the landing was generally due to more logs meeting specification and more accurate length measurements. Radiata pine stems are too long to be hauled to a central processing yard without some initial cuts being made at the stump. Initial cuts preempt future log manufacturing decisions. An analysis of fixed long length patterns indicated that about 5? of possible value would be foregone by these preemptive cuts. To analyse the effect of alternative log manufacturing locations on harvesting productivity and costs a stump-to-milldoor simulation model was constructed. Tree-length logging to large landings was the most productive and least costly alternative, the stump was the second best alternative, and the central processing yard was the most expensive and least preferred alternative. In an overall economic analysis it was concluded that where possible large landings and yarders should continue to be used. Where it is not possible to use large landings, final log manufacturing should be carried out at the stump, provided log manufacturers have handheld computers to assist them in decision making so that value recovery is kept as high as possible.
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