it did need high pruning to be effective at producing dawlogs; and once you
add the cost of that into the equation on discounted revenue, it all became
a bit iffy.
It was discussed extensively by the RFS, & there is an article in one of
their journals of about 5 years ago
Rupert
-----Original Message-----
From: Andrew Heggie [mailto:andrew.heggie@xxxx.ntl.com]
Sent: 04 February 2003 20:59
To: UK Tree Care
Subject: Re: Crown thinning Corsican pine
On Tue, 4 Feb 2003 20:27:10 -0000, simon pryce wrote:
There was a similar idea being promoted some years ago called Oceanic
Forestry [yes really], which was supposed to work better on the windier
western parts of the country. From memory the main proponent was a Major
Dennis Moore, who always reminded me of a Monty Python sketch.
One of their more radical ideas was thinning forestry stands by ring
barking
or poisoning the trees that weren't wanted. The idea was that they died
standing and disintegrated so the stand was opened up gradually and was
less
susceptible to windthrow.
I think the chief benefit of this system was to achieve a higher
proportion of sawlog in stands whose endemic wind throw would normally
preclude thinning and be top height limited. I suspect high pruning
may also be required.
With very limited markets for thinnings and interest in sour felling
for fuelwood it may be very well worth revisiting, with the intent of
desiccating and then harvesting the dead stems, anyone remember the
swedish boy scout's hatchet for delivering glyphosate?
Back in 1980 I designed a device for ringbarking, based on a pipe
cutter and hand brake mechanism. My initial trials seemed to show the
ringbarked trees took 2 seasons to die, whereas the glyphosate treated
ones were dead in a season. This has implications for dry matter loss.
AJH
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