Here’s the part that surprises people. When you pull a soil sample from a block that’s functioning well, the largest share of the stable carbon in it isn’t leftover plant residue. It isn’t the compost you applied. It’s dead microbes. Cell walls, membranes, the chemical wreckage of billions of organisms that lived, ate, and died in that soil. Soil scientists call it necromass. It binds to clay and silt surfaces, and once it does, it can sit there for centuries.










