Right, but my question is why do they have to be replanted? Certainly willows are much longer lived, in the wild, just as are other tree/shrubs, even the smaller bushy ones. Is it a matter of soil depletion? It just seems a bit odd -- and that site says nothing about it. I'll have to look around, I know I was on another site awhile back that was about the same thing, had some pictures of equipment converted to harvest small woody plants, which is what I was interested in.
On Wed, Feb 27, 2002 at 01:19:01PM -0500, Appal Energy wrote: > Harmon, > > "Coppiced" refers to the tri-annual cutting back ("pruning" if you will) of > willow. One year to first cut, where the "pruned" material is cold stored as > "cloned" stemstock. Two to three more years to first harvest maturity. An > approximate 22 year rotation, complete with 6-7 harvests before a new > planting. > > Poplar has been studied under similar circumstances. > > I hazard to suggest that the primary intent of willow and poplar for such a > crop is to achieve high yields with a short turnaround time. As well, the > small diameter stalk makes harvest comparably easy with equipment already > existing on many farms. > > I have no familiarity with aspen other than checking them for signs of bear > and enjoying their leaves as the rustle. > > Were aspen to produce equivalent energy yields over time, I believe it would > be prudent to begin planting them as well. > > Todd Swearingen > ----- Original Message ----- > From: Harmon Seaver > To: biofuel@yahoogroups.com > Sent: Wednesday, February 27, 2002 12:08 PM > Subject: Re: Coppice Willow & Hardwoods Part Dieu was Re: [biofuel] Re: > Cornburning Stoves > > > I notice that one the willow site it says that "the duration a > typical rotation - about 22 years" which I take to mean that then they > have to be replanted? Any idea why that is? And perhaps then aspen would > be better, since the group is usually all one organism and lives for > centuries, and can be coppiced in the same manner. > > > Harmon Seaver > CyberShamanix > http://www.cybershamanix.com > > > Yahoo! Groups Sponsor > ADVERTISEMENT > > > > > Biofuel at Journey to Forever: > http://journeytoforever.org/biofuel.html > Please do NOT send "unsubscribe" messages to the list address. > To unsubscribe, send an email to: > [EMAIL PROTECTED] > > Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. > > > > [Non-text portions of this message have been removed] > > > > Biofuel at Journey to Forever: > http://journeytoforever.org/biofuel.html > Please do NOT send "unsubscribe" messages to the list address. > To unsubscribe, send an email to: > [EMAIL PROTECTED] > > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ > -- Harmon Seaver CyberShamanix http://www.cybershamanix.com ------------------------ Yahoo! Groups Sponsor ---------------------~--> Buy Stock for $4. No Minimums. FREE Money 2002. http://us.click.yahoo.com/BgmYkB/VovDAA/ySSFAA/FGYolB/TM ---------------------------------------------------------------------~-> Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Please do NOT send "unsubscribe" messages to the list address. To unsubscribe, send an email to: [EMAIL PROTECTED] Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/