2013, 2014, and 2015, with funding from Ohio Soybean Council and help from county extension educators, we measured soybean yield limiting factors on 199 farms across the state. Data collected included management practices (i.e., crop rotation, variety, row width, etc), soil fertility status, soybean cyst nematode (SCN) egg counts, and soybean yield. These were the top yield-reducers in our research: