Second could be bioturbation... worms or other thingies pulling woodyThat's a likely one--carbon moving down rather than N moving up. Thanks!
material down into the soil creating local low N spots?
It seems like there is a need to align your mulch approach and your target community composition.I think so, too. Elaine Ingham and others have done a lot of work showing that non-woody plants (veggies, grasses) live in and prefer bacterially dominated soils, and those can be created using mulches and composts from non-woody tissue. (makes sense, yes?) Tree crops prefer fungal-dominated soils, which derive from woody tissue. Fungi are much better at breaking down wood than bacteria.
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