Soybeans
Iowa is a top producer of soybeans in the United States. Discover the latest research-based information for soybean production in Iowa as well as the general agronomics of soybean production and soybean growth and development.
Iowa is a top producer of soybeans in the United States. Discover the latest research-based information for soybean production in Iowa as well as the general agronomics of soybean production and soybean growth and development.
Timely Insights on Soybeans
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April 14, 2026Content Author
Outside of northwest Iowa, which has missed more of the recent rains, field activity across the state has either been limited or brought to a halt due to the wet conditions. With much of the state waiting to get back into the field and get a start on planting, ISU Extension and Outreach field agronomists provide updates on what they are seeing and what’s happening in their respective regions across the state.
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April 10, 2026Content Author
A few months ago, we discussed the upcoming 2026 modernization of the U.S. coordinate system and what it could mean for precision agriculture. As the transition date approaches, more details have been released, and it’s time for Iowa growers to start preparing.
A Quick Refresher: What Is Changing in 2026?In 2026, the National Geodetic Survey (NGS) will officially replace:
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April 6, 2026Content Author
Before making pesticide applications this spring, make sure to check areas near fields to prevent off-target pesticide exposure. Herbicide labels often require applicators to consult a sensitive crop registry to identify nearby non-target plants, beehives, or organic farms before application. For example, the dicamba products Engenia, Stryax and Tavium require documentation that the sensitive crop registry was checked.
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March 26, 2026Authors
This spring began with higher and uncertain phosphorus (P) and potassium (K) fertilizer prices, with a higher increase for P fertilizers. Fortunately, corn and soybean grain prices began increasing in February and expectations are for further increases, mainly for corn (Chad Hart - Ag Market Outlook). Although many producers already applied the phosphorus (P) and potassium (K) needs for 2026 last fall, others will apply them this spring and are considering reducing planned rates due to lower expected economic benefits from fertilization. However, reducing P and K rates across all conditions is not a good management decision.
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March 26, 2026Authors
Seedcorn maggots feed on germinating seeds or seedlings of both corn and soybean (Photo 1). Feeding can slow development or kill the plant, and plant injury is more prevalent during cool, wet springs when plants grow slowly. With planting right around the corner, we recommend that farmers track growing degree days, plant during the fly-free period, and avoid planting into cool, wet soils, especially in fields at high risk for injury. High-risk fields include those with a history of seedcorn maggot injury, recently tilled fields, and fields where organic matter was recently incorporated (e.g., manure or cover crops).
