Now is the time to start scouting for sulfur deficiency in corn plants. As you’re out and about this spring, keep these three tips in mind to successfully identify sulfur deficiency.
- Check young corn plants. Sulfur deficiency is most obvious early in the growing season, when the plant is most vulnerable to nutrient shortages.
- Look at leaf color. From afar, plants with a pale green appearance should be inspected closer for nutrient deficiency symptoms. Both sulfur and nitrogen deficiency are marked by yellow striping between the veins of the leaf (interveinal chlorosis), which can cause confusion when diagnosing sulfur vs. nitrogen deficiency. The image above shows sulfur deficiency.
- Inspect plants’ youngest leaves. Sulfur deficiency shows up in the youngest leaves of the corn plant first, while nitrogen deficiency appears in the older leaves first. The difference is related to how each nutrient is mobilized in the plant.
The good news is that sulfur deficiency can be quickly corrected with a broadcast application of SuperCal SO4. An application rate of 100-150 lbs/acre will result in plant green-up in as little as seven days.
Keep in mind, corn needs sulfur throughout the growing season, so make sure you are supplying a source that offers flexible application timing and a release pattern that is compatible with plant requirements. For more details, click or tap to watch the video below comparing SuperCal SO4 and AMS.