In a message dated 2/4/03 01:00:58 GMT Standard Time, dscottcul@xxxx.net
writes:
I think what I'm uncomfortable with is the notion that all trees with
tragets
need to be thinned or will be made safer by thinning. In many cases the
reduction in risk (whether thinning would effectively accomplish it or not)
is
not needed of if needed is not reliably accomplished by thinning.
I wasn't suggesting thin everything, but Corsicans, if they do have a
propensity for windthrow (and if its acknowledged by Foresters) then there
may be an argument there. The same statement (Corsicans topple Scots snap)
means that I would never bother thinning a Scots (unless I was trying to
reveal/show off that lovely onion skin bark on a specimen).
Now if you're a bit suspicious about root damage, (nothing blatant but
regularly mowed grass is not a natural state of affairs is it?) then a
'subtle' crown thin may be the answer. It may also reassure a paranoid
owner....
The trouble with specifying crown thinning is the BS3998 spec of one third
the leaf cover is a bit drastic in my mind, you need to be much more subtle
than that. Julian Dunsters 'Spiral Thinning' rolls off the tongue beautifully
but sounds a bit drastic to me. Be subtle, hand saws only, no Lion tails.
Don't go too much further than removing the dead wood.
Bill.
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