WARREN - Landmark Services Cooperative is announces the addition of Bill Argall as the location manager for the cooperative's newly acquired agronomy location in Warren. A lifelong resident of this region, Argall grew up on a farm near Livingston and was a 1994 graduate of the University of Wisconsin-Platteville with a bachelor degree in agribusiness. He started his career in agronomy with TERRA Chemicals, working with producers on the Janesville prairie for more than eight years.