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Regional Crop Update June 8 - June 16, 2026

By Rebecca Vittetoe

The storms that rolled across the state last week also brought along with them heavy rain, wind, and even some hail. While most areas did receive some rainfall, parts of northwest Iowa missed out and the drier conditions are starting to show. Weeds continue to be the biggest challenge across the state as many are struggling to get their postemergence herbicide applications made with the wet field conditions. Read on for more specifics on what’s happening around the state.

Leah Ten Napel (Region 1)

Cherokee, Ida, Lyon, Monona, O'Brien, Osceola, Plymouth, Sioux, Woodbury counties

“Corn and soybeans are progressing nicely. Many bean fields were sprayed with herbicide last week or are being sprayed this week. Corn is canopied and looking healthy. Cooler temperatures are helping, but areas are getting dry. A timely rain would be very helpful for chemical residuals and new growth. Insect and disease pest issues are low at this point in the growing season.”

 Terry Basol (Region 4)

Benton, Black Hawk, Bremer, Butler, Chickasaw, Floyd, Grundy, Howard, Mitchell counties 

“Corn and soybeans continue to look really good in north-central and northeast Iowa. Corn ranges from V4–V7 for most of the acres, and soybeans range from V3–V5. Farmers are wrapping up nitrogen sidedress operations for corn as well as getting the postemergence herbicide applications completed. Canopy closure has begun on the early planted fields. The corn that is the most mature has really taken off, looking nice and dark green, as the nodal root system has transitioned to the primary root system of the corn plant for uptake of water, nitrogen, and other nutrients. Due to conducive growing conditions, some corn fields are exhibiting rapid growth syndrome.

Source : iastate.edu

Trending Video

Supplemental Nitrogen on Soybeans: Can Early Nitrogen Increase Yield?

Video: Supplemental Nitrogen on Soybeans: Can Early Nitrogen Increase Yield?

Can supplemental nitrogen help soybeans reach higher yield potential? Technical Agronomist Tim Sickman walks through an ongoing trial at the Nutrien Innovation Farm in Owensboro, Kentucky, exploring whether a modest amount of nitrogen applied at planting can support higher-yielding soybean environments.

The trial compares 30 pounds of supplemental nitrogen across both 15- and 30-inch rows, along with treatments that include sulfur and micronutrients. Similar trials conducted in 2024 and 2025 delivered a six- to seven-bushel yield response, prompting the team to expand the research this season.

Early observations show that treated soybeans are slightly taller and averaging about two additional nodes on the main stem. These added nodes could create more opportunities for blooms and pods, but the true results will come at harvest when the team evaluates pod development, seed fill and final yield.

In This Video:

Why high-yield soybeans may need supplemental nitrogen

Results from the 2024 and 2025 trials

Nitrogen treatments in 15- and 30-inch rows

Fertilizer placement and application methods

Differences in plant height and node counts

Potential effects on pod development and yield