Neale Donald Walsch said this quote
“ …there is rapidly developing a soil shortage on your planet. That is, you are running out of good soil in which to grow your food. This is because soil needs time to reconstitute itself, and your corporate farmers have no time. They want land that is producing, producing, producing. So the age-old practice of alternating growing fields from season to season is being abandoned or shortened. To make up for the loss of time, chemicals are being dumped into the land in order to render it fertile faster. Yet in this, as with all things, you cannot develop an artificial substitute for Mother Nature which comes even close to providing what She provides. ”