Grist

Fiber optic cables, of all things, have now exposed just how badly tilling messes with a farm’s ability to retain moisture. Using a technology known as distributed acoustic sensing, or DAS, scientists analyzed how seismic waves disturbed the cable as they rippled through harrowed fields compared to adjacent undisturbed plots. This created subtly distinct signals, showing that plowing obliterates the “capillaries” that carry water like tiny interconnected reservoirs. The findings point to a serious problem with modern agriculture, to be sure, but also to solutions.