I gathered up leaves last week, dragged them with a tarp over beside the
compost bin, spread them out, ran over them repeatedly with a mower. Add another layer, repeat. Chewed them up real good, real fast. The more you mow, the finer the end product.
I spent the last few days taking a good hard look at leaves. As a top layer of mulch, whole leaves still serve my needs as I use oak leaves and they are rather small and narrow.
However...
Looking at the forest floor I find whole leaves on the top surface. Under that are somewhat decomposed leaves. At ground level are leaves in an advanced state of decay, much of them in a small size, with finer material intermixed with the soil. If I wanted to emulate the natural duff on a forest floor, I would want to employ layers of mulch in fine/course/whole grades. There is the issue of Nitrogen robbing. In the forest, the old/fine stuff has been weathered, decomposed, and chewed by bugs, which add their bug manure to the equation, and infiltrated by fungi which has aided in moving N, along with other nutrients, to and from the duff.
So I've been putting my feeble mind to the task of coming up with a way to condition mulched leaves in order that they won't slurp up N from the top surface of the soil. The first plan is composting shredded leaves first, applying the compost, then applying whole leaf mulch. This plan adds complexity, hence more work and effort, but the gain seems dubious. The next plan is to cease any and all tilling. Rake off the old mulch, add plants, replace the old mulch, adding more as needed. This plan serves to preserve the aged/conditioned mulch with as little disruption to the soil environment as possible.
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Greenthumb: while the 'Leaf Stomping' can be a fine family event, some of the homes from which those bagged leaves come have dogs and cats in the yard. Way back in the day when I jumped in the leaf piles I learned this was often followed by a 'hose down the kid' event.