By Scout Nelson
The latest Nutrient Management Podcast episode focuses on sulfur use in Minnesota crops, exploring fertilizer guidelines, application timing, and new research findings.
Panelists discussed whether current sulfur fertilizer guidelines are expected to change. According to experts, no major updates are planned at this time, but recommendations may evolve as more data becomes available. Researchers continue to examine how sulfur affects crop performance, especially under changing environmental conditions.
"What does current research tell us about managing sulfur for Minnesota crops?"
One key point discussed was in-season sulfur management. Applying sulfur at the right growth stage is important to meet crop demands and avoid nutrient deficiencies. Timing can impact yield and efficiency, especially for corn and soybean crops.
Panelists also explored sulfur sources. They highlighted that sulfate-based fertilizers provide immediate availability, while elemental sulfur needs time to break down. In-season applications should consider weather, soil type, and the form of sulfur used.
Another important topic was sulfur carryover. In sandy or low-organic soils, sulfur doesn’t last long, so reapplication might be needed. In heavier soils, there could be more carryover potential, though results vary by region and rainfall.
"Should growers proactively add sulfur to crops out of caution, or is that practice unnecessary?"
Experts agreed that blindly applying sulfur without soil testing isn’t always helpful. Overuse could be wasteful or even harmful. It’s better to base application decisions on field history, test results, and visual symptoms of deficiency.
Panelists concluded with several reminders: watch for deficiency signs, time applications carefully, and consider soil conditions. Accurate decisions about sulfur can improve yield and protect soil health. Future research will continue to guide best practices in Minnesota.
Photo Credit:gettyimages-brian-brown
Categories: Minnesota, Crops, Corn, Soybeans, Weather