Talk:Selection cutting

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Selection Cutting is more about the silvicultural goals rather than the logging methods, so if it has to be merged, perhaps it should be merged into the forestry page. -The Gomm 02:51, 7 September 2006 (UTC)

Also known in Britain as 'thinning'. I dispute the assertion that it is a method of maintaining timber production only in uneven-aged stands, I am currently thinning even-aged spruce stands in northern Britain. I agree with The Gomm, should be merged with forestry. The Boy that time forgot 20:54, 20 October 2006 (UTC)

Perhaps we should separate the concept of even and uneven age selection. The Gomm 20:58, 21 October 2006 (UTC)
PS I don't advocate a merge, but if we are in merger-mania, then the merge should perhaps be into forestry.

Contents

[edit] deleting merge tags?

How long should we keep the merge tags before deleting them? The Gomm 00:16, 26 October 2006 (UTC)

[edit] DBq Method

Would it be impertinent to suggest that this material would be better suited to an article of it's own, to be linked from here. I may of course be wrong. Still keen on a merge to forestry.The Boy that time forgot 22:18, 30 October 2006 (UTC)


It would certainly be possible to make an article about the DBq method. However, I'm not convinced that any article aside from this one (or the one that this is merged into, if it is in fact merged) would need to link to it. At least in WI, DBq is synonymous with Single-Tree Selection. As such, I'm not sure that making a separate article makes very much sense. As time permits over the coming weeks, I had planned on expanding this article with references, examples, photographs of harvested stands. Hopefully enough such that it's less of a stub, and more of an article. crh 07:37, 31 October 2006 (UTC)

Nice work, but: " a form that is known to be sustainable." - What does that mean?- Also lean against merging KAM 12:29, 31 October 2006 (UTC)

How is the new wording? A technical definition of a sustainable distribution would be one such that D(i*n+eps)+H = D((i+1)*n-eps) where:

  • D(t) gives the diameter distribution at time t
  • H gives the amount of the harvest
  • n is the cutting cycle
  • i is any whole number
  • eps - a very small number +eps -> just after, -eps -> just before

To be technical, there are quite a number of combinations of D and H that satisfy these conditions, not just DBq style ones. In some forest types, even diameter limit cuts are sustainable (eg, cut everything bigger than some X). crh 03:43, 1 November 2006 (UTC)

I like the separate DBq page idea. And lean against either of the proposed merges. The Gomm 04:21, 1 November 2006 (UTC)

Is diameter limit considered a method? If it is common, and I think it may be perhaps it should be added. KAM 21:30, 1 November 2006 (UTC)

Diameter limit is a common management technique in large areas of continental Europe, however I am not sufficiently familiar with the method to accurately outline it here.The Boy that time forgot 21:34, 1 November 2006 (UTC)


In the midwest US, on the other hand, diameter limit cuts are highly unpopular. The feeling here is that they degenerate too easily into high-grading. Joseph Buongiorno, a prominent forest economist from the University of Wisconsin at Madison, once published a paper in which he pointed out that the harvest which satisfies the criteria I listed above and gives the maximum economic value is a diameter limit cut. He had a lot of data to back this up, and a simulation model demonstrating that it was in fact sustainable. Nonetheless, there were still letters sent to the dean demanding that he be fired for recommending "the destruction of Wisconsin's forests". crh 06:59, 2 November 2006 (UTC)


I added a line about diameter limit and included a source here: http://www.dnr.cornell.edu/ext/forestrypage/assistance/pubs/infobroch/Just%20Say%20No.pdf The name of the source is "Just say no to high grading" it is from Cornell how is removing a source POV? KAM 18:50, 5 November 2006 (UTC)

Sorry about that, I'm still new to this and it looked to me like it was just a line of text shoved in at the end of the article. No offense intended.The Boy that time forgot 19:10, 5 November 2006 (UTC)

[edit] even and uneven aged

I may be missing someing but I not sure if we all mean the same thing by "maintain" My understanding (may be local terminology) is that if you start with an even-aged stand and select cut it you are "thinning'. At some point it will either be a stand with mature trees all the same age or regeneration is going to slowly change the stand to an uneven-aged stand. If you clearcut a stand (even or uneven) you will end up with an even-aged stand. If you select cut a stand (uneven or even) it will stay uneven or you will eventually end up with an uneven aged stand. [1] KAM 13:32, 2 November 2006 (UTC)

I agree to an extent, depends on your situation however and this I think is one of the major difficulties in attempting a balanced article on a forestry related subject, particularly when the contributors come from diverse backgrounds and parts of the world. I'm sure our Brazilian colleagues could add something to this mix. My personal obsession with even-aged stands arises from the fact that these are the conditions within which I work, spruce planted in the 1950's with the single objective of being clearfelled, well, now. Our objectives have now changed (thankfully say some) and where conditions permit we are attempting to convert areas to continuous cover multi-aged complex stands. The objective is therefore to become uneven-aged but at this early stage in the conversion process most stands remain even-aged.The Boy that time forgot 19:06, 5 November 2006 (UTC)

With a second look I see it does not say maintain. I think it is ok but could be more clear perhaps. KAM 22:05, 12 November 2006 (UTC)

[edit] High Grading

Should there be mention of using some form of independant certification to legislate against the practice of high grading. I'm not aware of the current situation in North America regarding certification however in northern Europe (FSC, PEFC) actively prohibits this type of activity.The Boy that time forgot 21:09, 8 November 2006 (UTC)

[edit] Pictures!

This article should have pictures. Who is with me!128.101.70.112 20:47, 8 March 2007 (UTC)

Who are you? The Boy that time forgot 22:19, 9 March 2007 (UTC)