this post was submitted on 03 Aug 2023
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Alternative to phosphate fertilizer: Biochar basis controls plant response (phys.org)
submitted 1 year ago by Fried_out_Kombi to c/permaculture
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TL;DR: New research shows that biochar made from phosphate-poor feedstock encourages much more symbiosis with mycorrhizal fungi, compared to biochar made from phosphate-rich feedstock, which encourages very little mycorrhizal symbiosis.

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[โ€“] MasterBlaster 2 points 1 year ago (1 children)

I recall reading that someone discovered that a primary reason the amazon forest is so fertile now is that it has a huge stock of biochar left by the mayan civilization.

Either they knew what they were doing, or it is a happy effect of all the cooking fires they made, from the char they left in the area.