While in Brazil, I saw a block-plot test of E. grandis that researachers said produced 87.8 cubic meters/ha/yr of wood from SEEDLINGS! The best clone (from rooted cuttings) produced 95.6 cubic meters/ha/yr (measured at age 33 months). David South At 05:41 PM 10/7/98 -0700, you wrote: >Here's a simple one: > >What are the highest yields for plantation species? Figures I've got suggest >that eucalypts might, ideally, give up to 20 metric tons per hectare. >Someone mentioned poplars giving up to 40 tpa and I'm aware that beyond >trees, the grass Miscanthus may outyield these. > >If you don't have figures at your fingertips, any websites to search would >be much appreciated. > >I also appreciate that we have to consider inputs, sustainability, long term >pest and disease issues etc. but I'm just looking for ballpark figures for >the moment. > >This could be Guiness Book of Records time ... > >Regards > >Eric Boa > David South School of Forestry Auburn University, AL 36849-5418 A member of the Forester's Chapter for ZPG http://www.forestry.auburn.edu/people/faculty//biology/south/zpg/forester.html I am NOT a member of SAF since some of the nursery management practices I advocate are based on economic principles and are not "consistent with ecologically sound principles." dsouth@forestry.auburn.edu 334-844-1022 334-844-1084 (FAX) As always, views expressed here are my own (and I am not speaking on the behalf of others). I use only 100% post-consumer paper in my home printer. (discarded used office paper printed on one side) ========================================================================= The world population is expected to double by the year 2100. Therefore the annual demand for wood for energy (etc.) will increase and might double (to more than 7 billion m3/yr). To provide plantation wood for people in the future, support the planting of trees on pastureland. Set a goal of converting 8 million ha of pastureland/yr for the next 55 years. This would increase tree plantations to about 5% of the world's landbase. ========================================================================= Support Zero Population Growth for the United States http://www.igc.apc.org/zpg/index.html
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