www.striptillfarmer.com/articles/farm-progress-show-video-calmer-showcases-world-s-first-30-row-12-inch-corn-head
Farm Progress Show Video: Calmer Showcases World's First 30-Row, 12-Inch Corn Head
September 12, 2013
At Farm Progress Show 2013, Calmer Corn Heads showed, for the first time, a 30-row, 12-inch corn head. In this video, Marion Calmer explains how the company approached the challenges of developing a 12-inch corn head.