https://www.npr.org/2021/02/24/967376880/new-evidence-shows-fertile-soil-gone-from-midwestern-farms https://www.npr.org/2021/02/24/967376880/new-evidence-shows-

https://www.npr.org/2021/02/24/967376880/new-evidence-shows-fertile-soil-gone-from-midwestern-farms https://www.npr.org/2021/02/24/967376880/new-evidence-shows-... Basically our use of fertilizer and weed killer killed off our microbiome in the soil. This lead to soil collapse where churning biological process add nutrients back to the soil.