What’s actually working in soybeans right now? Not guesses—real answers from hundreds of on-farm trials across Iowa. In this What’s Working in Ag segment, we sit down with Alex Shaffer, Research Agronomy Lead at the Iowa Soybean Association, to break down what real, on-farm data is showing farmers right now—and where they may be overspending.
www.iasoybeans.com/Farm4Profit
Through more than 200 on-farm trials each year, the Iowa Soybean Association is helping farmers make better decisions based on real-world conditions, not controlled plots. Their work spans everything from seeding rates to fungicide use to nitrogen efficiency, all with one goal: improving profitability and sustainability at the farm level.
One of the biggest takeaways? Many farmers are planting more soybean seeds than they need. Research shows populations can often be reduced to around 110,000 seeds per acre without sacrificing yield, creating a clear opportunity to cut input costs in tight-margin years.
Another major focus has been fungicide and insecticide applications. Despite common “program” approaches where these products are applied every season, multiple years of trials have shown that in the absence of disease pressure, these applications rarely pay. In fact, only about one in five blanket applications delivers a return, reinforcing the importance of scouting before making application decisions.
The conversation also highlights how far crop genetics have come—reducing the need for routine treatments that may have made sense years ago but don’t always deliver value today.
On the corn side, nitrogen efficiency continues to stand out. Some of the most efficient operators are producing strong yields using as little as 0.6 pounds of nitrogen per bushel by leveraging practices like split applications and better timing. Trials are also exploring the value of stabilizers in spring-applied nitrogen, showing early signs that protecting that investment can make a difference.
At its core, this episode reinforces a simple but powerful idea: farmers don’t need more data—they need better data they can trust. And when that data comes directly from farms like theirs, it becomes a tool they can use with confidence.
If you’re looking for ways to trim costs, improve efficiency, and make smarter agronomic decisions, this is a conversation worth paying attention to.