What’s old is new again, at least on some Midwest farms.
Winter cover crops have been used by farmers for centuries, but over the last decade or so they have once again started to become more popular.
The idea is to create biomass in fields that would typically be dormant over the winter. Cover crops like vetch, rye, kale and winter peas can grow after a corn harvest, maintaining live roots in the ground on farm fields in an effort to control erosion, preserve moisture in the soil, and to keep damaging chemicals on fields and out of streams.