“In the Second World War,” Samuel Zook began, “my ancestors were conscientious objectors because we don’t believe in combat.” The Amish farmer paused a moment to inspect a mottled leaf on one of his tomato plants before continuing. “If you really stop and think about it, though, when we go out spraying our crops with pesticides, that’s really what we’re doing. It’s chemical warfare, bottom line.”
Eight years ago, it was a war that Zook appeared to be losing. The crops on his 66-acre farm were riddled with funguses and pests that chemical treatments did little to reduce. The now-39-year-old talked haltingly about the despair he felt at the prospect of losing a homestead passed down through five generations of his family. Disillusioned by standard agriculture methods, Zook searched fervently for an alternative. He found what he was looking for in the writings of an 18-year-old Amish farmer from Ohio, a man named John Kempf.
Kempf is the unlikely founder of Advancing Eco Agriculture, a consulting firm established in 2006 to promote science-intensive organic agriculture. The entrepreneur’s story is almost identical to Zook’s. A series of crop failures on his own farm drove the 8th grade-educated Kempf to school himself in the sciences. For two years, he pored over research in biology, chemistry, and agronomy in pursuit of a way to save his fields. The breakthrough came from the study of plant immune systems which, in healthy plants, produce an array of compounds that are toxic to intruders. “The immune response in plants is dependent on well-balanced nutrition,” Kempf concluded, “in much the same way as our own immune system.” Modern agriculture uses fertilizer specifically to increase yields, he added, with little awareness of the nutritional needs of other organic functions. Through plant sap analysis, Kempf has been able to discover deficiencies in important trace minerals which he can then introduce into the soil. With plants able to defend themselves, pesticides can be avoided, allowing the natural predators of pests to flourish….
Avoiding mineral depletion long term is going to require a re-think of how we cause topsoil to erode.