If it seems like your soybean yields are plateauing, you’re not alone. When Ron Heck started noticing that his yields seemed “off,” the culprit surprised him.

“I knew there was yield variability in my fields, but I didn’t know exactly what was causing it,” said Heck, a former American Soybean Association president who has farmed for 45 years near Perry. 

Heck partnered with Iowa State University (ISU) researchers to find answers. ...