[Terrapreta] Net Present Value and Net Future Value ofTPBenefits

[Jon C. Frank]

BJ>The digester effluent is mixed with the
bio char before it put in the planting holes on the field.  Soil improver,
energy and soil micro-organism inoculant.

Hi Bakary and list members,

This is a most pertinant point.  Just last night I was reviewing a book
about the utilization of biogas slurry I bought in India and thought I
should mention to this list that biochar combined with slurry would be a
great combination.  This combination would actually be closer to the
original concept of terra preta where fertilizers were combined with
charcoal to create the dark earths.

A way to further remineralize the soil is to add finely ground rock powders
(especially rock phosphates) with the manure to be put into the digester.
The acid phase we make some of the phosphates water soluble and greatly
benefit your plants when combined with the biochar.

I would love to see a picture of your barrel.  I am working with a group in
Congo that is very remote.  The top soil is very depleted and does not
produce grains or vegetables very well.

Most of the people cook over wood fires and do not have electricty.  I have
developed a method of making compost under a shade tree using worms and have
included charcoal as an input.  Your method in a barrel looks like a
superior way to make charcoal.

Jon C. Frank


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[mailto:terrapreta-bounces at bioenergylists.org]On Behalf Of bakaryjatta