So to add one more thing to the response now to tie that back to what I was showing with the humus and sand being separated by the rain….

There’s more than just one variable at play here…….It’s chemical and physical……Looking at the last pic I just posted…….If I went in there and tried to "cut in" my next crop of OM into the soil……not only would I rapidly increase the rate of decay but I would expose all of that refined humus to the elements and the pounding of the rain drops……Just like you saw in my previous pics I could take that whole layer of black dirt you see and have the rain separate it out and wash it away if I managed that way. ........Here it is again.