Buried wood can last a long time and be beneficial.
But char...a cubic cm of char produced at a high temperature can have the surface of a football field!
Char found in the terra prieta of the amazon is more than 1000 years old. So a single application can last indefinitely. There’s a video called 'El dorado' that is pretty inspirational. We make char with prunings in an adapted steel drum called a TLUD that works at 800C and produces char rapidly without smoke.
I’m a fan of Fukuoka, he’s been an inspiration since the 80's, but we’re moving along within a plethora of ideas and technologies, trying not to be overwhelmed.
Peter
Looked at the documentary, now I get the name "Finca La Isla"
. Those civilisations then probobly cooked their food with a TLUD or similar and then returned that to the field. I don't cook food so can't do that but others cooking their food could do this with ease.
The man who was selling the tierra preta said every 20 years it's regenerated it enough to sell again. He didn't say if he added char but I assue he just left the land re-vegetate itself and the 20cm of T.P. he left can sustain the re-growth cycle with plenty of nutrients and char innoculated with biome.
So in 20 years we will probobly have a thick layer of T.P. for our maturing durian and if we add char that could provide "shelter' for M. O. during drought and reduce nutrient run off from the decomposing forest litter. So fukuoka probobly buried logs in his terraces to create that T.P. structure deeper down that was not there and then rely on the natural cycle of growth and litter to add new ontop. By doing that getting yeilds faster and also long term (his son still get's decent yeilds).
"trying not to be overwhelmed" Yes same here, trying to keep it very simple, otherwise I will probly not last long enough.
I have spent many hours trying to find a micro. org. lab analaysis of native soil underneath durian in it's native area, but have only found indications of what typ of species of micro. org. is in dipterocarp forest.
If anyone have found something like that please share For now I am relying on the native micro biome here as an inoculant.
"
dipterocarps are ectomycorrhizal trees, and their seedlings are linked by a network of fungal hyphae that transfer nutrients from decaying organic matter to seedlings."
https://unitedplantsavers.org/restoration-of-the-heart-lessons-from-the-all-mighty-shorea-faguetiana-tree/So I am fairly sure this would include durio sp., just gotta get that myco thriving instead of guinegrass :/ and then the mother durian can nurse it's own durian seedlings
I think one step I missed early on was to not establish pionerring tree's before planting durian in the grass field, it's been almost impossible keeping them alive without supplemental water and mulch.
Planting out pioneering tree's since a couple years ago and some durian looks a lot better now with some shade and supression of the allelopathic grass.
Local durians still dropping a little bit but they haven't been the greatest, a bit less sweet and mushy aril maybe due to the rainy weeks. The same tree's produced great fruit early on in the season.
Idk how the durian is going up at the highlands here, a couple of years ago I got fresh durian in june from Julatten.