For as little as 20 cents per acre, no-tillers can significantly increase the effectiveness of their post-emergent herbicide applications. The addition of inexpensive ammonium sulfate (AMS) to the tank mix can boost no-till weed control by as much as 41 percent in some cases, according to Bryan Young, a weed scientist at Southern Illinois University.

His hopes were high, but Brock Baker never expected to get a 10-bushel yield advantage and nearly complete weed control with the 280 acres of Roundup Ready soybeans he planted last year.