As long as there has been agriculture, there have been insects, mites, and other creatures eager to share in the bounty. Pests remain an enduring problem for agriculture. Increasingly, communities are seeing even pesticides designed to deter or eliminate pesky insects become a liability as essential pollinator populations decline, unwanted toxins infiltrate crops—endangering farmers and consumers—and insects develop resistance to traditional deterrents and poisons. One possible solution: rocks. Crushed rocks, to be precise. Seeding mineral-poor soils with pulverized rocks not only introduces badly-needed nutrients to the plants they house, it ...