Amuri Hills Forest Partnership
13 October 2003
We are pleased to report as follows:
Forest Stand Progress
Your Radiata pine clearwood regime HF2 at Hopefield Station received a second lift of pruning in the autumn.
Our auditor, Patrick Milne of Southern Cypresses says in his report that his plot data shows an average of 333 sph (stems per ha) are pruned; the average pruned height is 5.33m; and the average DOS (Diameter Over Stubs) is 14.7cm. This data indicates an above average site for Canterbury.
It is likely that the Consultant will advise us to do no more pruning, just thin down to 400 sph. Originally the Forestry Plan and budget provided for pruning up to 6.5m. But it would not be a good investment to pay for a third lift that gains only 1m more clear stem. As it stands now, the Partnership has gained a low per metre pruning cost by achieving a good pruned height with two lifts instead of three. To do more would lower the profitability of the pruning already done.
Further pruning has not yet occurred at Leslie Hills or Glens of Tekoa but will do very soon, along with the thinning of HF2.
After a lot of Spring rain in recent weeks we expect your stands are poised for prolific early season growth.
Foliage Nutrient Test Results
We have tested the foliage of your three Radiata stands for nutrient levels as part of routine tree health monitoring. Levels of all nutrients are satisfactory so there are no problems needing attention. Boron levels had increased from pre-application levels six years ago, as expected.
The trees certainly look healthy. ‘Healthy’ for pines is several years worth of long, dark green needles on straight stems. Foliage tests from time to time are recommended too in case there is a nutrient problem not evident from appearance during normal conditions, which may become a damaging problem during a drought.
If you have any queries about anything, or want more information, please don't hesitate to contact us.
WARREN FORESTRY Ltd
Manager for the AHF Partnership Committee
PS: A Newsletter covering a number of relevant and we hope, interesting forestry related topics will be sent to you soon.