Calcium Products - Andrew Hoiberg, Ph.D.

Calcium Products - Andrew Hoiberg, Ph.D.

Andrew Hoiberg, Ph.D.

Andrew Hoiberg, Ph.D.

Three Tips to Spot Sulfur Deficiency in Corn

Sulfur Deficiency

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.

  1. Check young corn plants. Sulfur deficiency is most obvious early in the growing season, when the plant is most vulnerable to nutrient shortages.
  2. 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.
  3. 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.

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IPFS Presentation Sulfur Deficiency in the Upper Midwest

It's been a great week at the Iowa Power Farming Show. This year Dr. Andrew Hoiberg presented each day to growers on Sulfur Deficiency in the Upper Midwest

The key take a ways are:

Sulfur deficiency is often confused with Nitrogen deficiency, know what you are looking at.

Prior to 2005 little sulfur deficiency was observed

Sandy and loamy soils may exhibit more problems.

Soil tests may not adequately show a need for sulfur nutrition

Tissue tests of less than 0.25% Sulfur should show a response

Iowa State has documented yield increases of 7-18 bu / acre with applications of as little as 15 lbs /a sulfur

 

This Blogronomist article was written by Andrew Hoiberg, Director of Research and development. Here you will find a wide array of blog articles from Andrew and expert guests on topics related to soil and crop health, farming, and so much more. If it’s not here, ask us!

 

 

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Applying SuperCal Products on Snow Covered Ground

 

We are often asked about making application of our products on snow-covered ground. Applications in the late fall and early winter should have the same types of considerations as they do in other parts of the year.

When considering application timing, water should always be the preeminent issue. Water influences the movement of soil applied inputs, and when water has potential to run (and not infiltrate), then perhaps applications should be delayed. These events are not always easy to predict, so using your best judgment is the way to go.

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