Dear AD Based on your own work, I presume that the bacteria living in each environment are adapted to be able to break down whatever they find (i.e. high and low pH environments). So the productivity is a combination of the whole biome and not just the plants.
I asked Bill Mollison what he thought of the extraordinarily deep pine needle beds at the foot of the trees planted I the Eastern mountains of South Africa. In the area around Nelspruit there are large forests where formerly there was nothing. In fact the traditional name in SiSwati for the area means 'the treeless place'. After 70 years of pretty intensive planting, South Africa was turned from a wood-importing to a self-sustaining country, and even exports large amounts of paper pump and sawn timber. Under these forests there are 60cm deep layers of pine needles that have dropped from the trees above. Apart from being a huge fire hazard, they do grow (at least in Swaziland which is on the escarpment) large and delicious mushrooms that grow entirely under the surface. They are identified by the humps they push up. Bill though about it and said the build-up was caused by them having imported the tree seeds, but not the other components of the bio-system that normally went with them. In fact they probably went to a lot of trouble to ensure there was no 'contamination' by seeds and fungus and bacteria. The result is that there is no local fungi and moulds and bacteria which can deal with the imported tree detritus. The solution is inoculation with an appropriate species, hopefully local, beneficial and benign. With the inclusion of char in the mix - something that occurs naturally in a forest through episodic fire events - it is even more complex than just the relationships between living organisms. It will be very interesting to see if anything from stove-derived char can be attributed to the unique characteristics that low temperature pyrolysis provides. Regards Crispin +++++++++ Dear Crispin, If one excludes soils formed by silt carried by rivers, or the soils formed by windborne dust, the rest of the soils are generally formed from the rock underneath the soil cover. There are large tracts of land which have only limestone as the bedrock, and yet the fields and forests in these regions are quite productive. So even limestone must be having the rest of the minerals needed by plants. Yours A.D.Karve _______________________________________________ Stoves mailing list to Send a Message to the list, use the email address [email protected] to UNSUBSCRIBE or Change your List Settings use the web page http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org for more Biomass Cooking Stoves, News and Information see our web site: http://www.bioenergylists.org/
