Did67 wrote:
I do not always agree on everything the Burgundians say, but it remains that they are real soil scientists (which I am not!). They write :
"La Terra Preta: Anthropogenic soil of great fertility due to a high concentration of charcoal, organic matter, nutrients. These soils generally contain a lot of fragments of pottery and have a strong biological activity. We are often asked. how to apply this in France for example. It should be understood that Terra preta can only develop and function on oxisols, latosols, or ferralsols. These soils have very old clays (kaolinite) of which the CEC is almost non-existent. pre-Columbian civilizations (large farmers) had (empirically) found that in THEIR environment, on THEIR soil, terra preta was the best way to guarantee sustainable production on soils which, without the forest, quickly become infertile. "
in:
Add to this the fact that it works better in some soils than in others! Or at least I would have translated it like that: the effects observed, compared to the surrounding groundare much more spectacular in these soils.
Understand that the Amazon, like all tropical zones, does not work with humic substances, mineralized too quickly under these conditions (heat, humidity). This gives these red, lateritic soils, without "OM" as we say. All organic matter is immediately "mineralized". And either leached or reused. In fact, both. So putting a "battery" capable of recharging very quickly, coal, is obviously a plus! In these conditions and in these soils! Like when you have a good shit and you take coal! But when we digest well, will it indeed improve our life ???
Well seen the quote of Burgundy ...