MINNESOTA FARMER'S INVENTION SMASHES ROOTBALLS BETWEEN ROWS, EXTENDS WINDOW FOR GROUND ROLLING. Jason Zimmer's heart sank every time he looked at the field. The west-central Minnesota farmer had rolled a quarter-section of soybeans the day after planting in May 2010. The soil was a bit tacky, and the big roller caused the moist ground to crust, hindering emergence.Rolling caused a 30% drop in his stands on the slopes and hills - a big price to pay for harvest ease. When it was wet again at soybean planting, Zimmer decided to skip using a big land roller and, instead, try his neighbor's invention.
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