I have a 2-bin system made from old corrugated roofing metal. I bent the sheets with a 2x4 into a square U shape, with 2 U's for each bin.
One is active, with the green stuff like grass clippings and kitchen scraps going there. The other is kind of storage for leaves and small sticks, for next year. Each year, I use the good stuff and switch to the other bin, using the slightly started last-year's leaves for a base. Oak leaves take a long time to break down, and this makes them more usable.
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