dhondt at eircom.net
Fri Nov 18 14:51:54 EST 2011
> My objection is that we can use a given biomass only once: we either
> return it to the soil to maintain humus and feed the microbes and other
> soil organism or we turn it into charcoal.
> Humus is capable of providing both the living environment and the food for
> microbes. There is no reason to assume that the microbes and other soil
> organisms in my soil would suddenly want prefabricated charcoal “apartment
> buildings” after having evolved without them for billions of years.
> I live in a semi-arid climate on heavy clay soil. The positive effect on
> fertility of adding biomass to the soil is immediately visible. According
> to a figure I came across recently, there can be 10 tons or more of soil
> organisms in 1 hectare of rich soil. These organisms need to be fed! I
> return every ounce of biomass available in my place to the soil. To turn
> biomass into charcoal would reduce the food I can provide to the soil
> The last 100 years have seen an unprecedented destruction of biomass.
> Many of our environmental, health and other problems can be directly or
> indirectly traced back to this destruction of biomass. Not aware of the
> importance of biomass for maintaining humus and soil fertility, the public
> is likely to favor any plan to destroy even more biomass - considered a
> waste by most – that, like biochar or biofuel, promises a quick fix to our
> environmental problems and allows us to continue the wasteful lifestyle
> made possible by industrial methods.
> On a global scale it doesn’t matter if someone wants to try out charcoal
> in his backyard. However, to have the effect on global warming that is
> claimed by biochar advocates, we need to turn biomass into charcoal on a
> large scale. Added to the destruction that is already ongoing and the
> devastation caused by biofuel production, this will greatly reduce the
> future prospects for organic farming, which relies on feeding the soil
> with biomass.
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