Answer: Fall is a great time to add more organic matter to replenish the soil, as well as additional soil amendments as indicated by the results of soil tests. If the soil is very heavy you might elect to leave it exposed to the weathering provided by the freezing and thawing cycles, or you might prefer to cover it with mulch to protect it from erosion. Another option is to grow a cover crop such as annual rye which would be turned under in the spring. As with so many aspects of gardening, it's up to you and whatever suits your schedule and methods.
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