This is a very old, and very workable approach to soil health management. https://en.wikipedia.org/wiki/Three-field_system https://en.wikipedia.org/wiki/Three-f

This is a very old, and very workable approach to soil health management. https://en.wikipedia.org/wiki/Three-field_system https://en.wikipedia.org/wiki/Three-field_system You have to ensure that what's being taken out of the soil is at least replaced, if not replaced and added to - especially around organic material and nitrogen. Humans have understood this for thousands of years, but the advent of artificial fertilisers allowed us to skip the "fallow" bit, thus increasing productivity in the short term.