Seeking to better understand herbicide resistance, researchers exposed more than 70 million grain amaranth seeds to a soil-based herbicide. Though preliminary, the findings suggest that the mutation rate in amaranth is very low, and that low-level herbicide application contributes little — if anything — to the onset of new mutations conferring resistance, say researchers at the University of Illinois.

Over the years, no-tillers have seen the benefit of providing effective season-long weed control and its impact on profits.