wild guess here, but it's probably helping with drainage? much like you'd use pe...

0xDEADFED5 on Jan 17, 2024 | parent | context | favorite | on: "Amazonian dark earth" was the work of ancient hum...

wild guess here, but it's probably helping with drainage? much like you'd use perlite, moss, coir, etc. improving nutrient availability not by decomposition, but by facilitating movement of the nutrients