Abstract
SYNOPSIS The results from four trials where fertiliser was applied to pine stands following second thinning are presented. It is concluded that although there is an immense research task still to be done, sufficient information is available to allow the forest industry to turn money into wood without the fear of not making a financial return on the investment. In the oldest trial fifty kilograms nitrogen and fifty kilograms phosphate per hectare increased the current annual increment of Pinus radiata from 13,344 to 17,893 cubic metres per hectare per annum over the 10 years of the trial. This gave an internal rate of return of 18,45%, based on current costs and prices.
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