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Taking the stress out of growing corn

Global warming is bringing longer growing seasons, allowing producers to expand the types of crops they cultivate. While this can be a benefit, a longer growing season increases the risk of environmental stressors, like frost and cool overnight temperatures.

Researchers from USask are investigating how the first frost impacts corn varieties, in the hopes of finding new ways to maximize crop yields.

“With global climate change, we are realizing that you can push the corn belt northward, so we’re wondering how we can enable the production of that crop by expanding the season,” said Dr. Karen Tanino, professor of abiotic stress physiology in the College of Agriculture and Bioresources.

The team is interested in the cuticular layer of the plant, a defensive barrier that acts like the plant’s skin. If the cuticular layer is more water repellent, it is full of waxy compounds that allow water to run off the plant.

“If water is not present, then the frost is not able to form, which means the plant can avoid that first fall frost,” said Tanino.

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R3 Corn Growth Stage Explained: Why Late-Season Tissue Sampling Matters

Video: R3 Corn Growth Stage Explained: Why Late-Season Tissue Sampling Matters

Corn pollination may be behind us, but the work isn't over.

In this field update from the Nutrien Innovation Farm in Champaign, Illinois, agronomist Tim Sickman discusses why growers should stay engaged with field scouting during the R3 (milk) stage of corn development. While favorable weather, strong pollination, and early grain fill are encouraging signs, important questions about crop nutrition and yield potential still remain.

Tim explains: What the R3 corn growth stage looks like

Why successful pollination isn't the finish line

The importance of late-season field scouting

How tissue sampling can identify nutrient deficiencies

The role of sulfur, zinc, potassium, and other nutrients during grain fill

Using tissue analysis to improve future fertility management plans

As corn moves through grain fill, understanding nutrient availability and plant health can provide valuable insights for maximizing yield potential and planning for next season.