Calcium Products - Items filtered by date: April 2017
Calcium Product 98G

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Calcium Products - Items filtered by date: April 2017

Meet our Updated Product Names and Logos

 

We have some exciting news to share! We are shortening our product names to 98G and SO4 and have created a new logo for each. Yes, we are retiring the “SuperCal” language in an effort to simplify the product names for more clear communication.

We are committed to growing brand recognition for 98G and SO4, and we’ll be updating materials over the next year.

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Rescuing Sulfur Deficiency with Topdress Application of SO4

SO4 vs No Sulfur

Photo above: 2016 sulfur trial on corn in Kanawha, Iowa at the ISU Northern Research Farm. SO4 applied at 150 lbs/acre (left) and no sulfur applied (right). SO4 application resulted in a 30 bu/acre increase compared to no sulfur.

Expect Sulfur Deficiency

With seemingly endless rainfall this spring, we can expect widespread sulfur deficiency as corn continues to emerge. The problem is that sulfate is easily leached from where the young corn roots need it in wet years. Sulfur deficiency shows up in the youngest leaves of the plant, and consists of green and yellow stripes in the leaves. Many confuse nitrogen deficiency with sulfur deficiency, and the most likely scenario is that it’s sulfur and not nitrogen since most growers typically put out more than enough nitrogen to meet crop needs.

To compound this problem, wet springs often mean that sulfur applications were skipped or postponed in lieu of getting seed in the ground during short windows of opportunity. Further, most sulfur sources that can quickly supply sulfur to the crop via topdress application have high burn potential.

Topdress SO4

SO4 is the perfect sulfur source for any application scenario, but the ability to topdress SO4 without any concern over crop burn makes it stand out against other sources.

Research conducted at Iowa State University with SO4 has shown that green-up will occur in less than 1 week with topdress applications up to V6.

SO4 Application Rates

How much sulfur you need to apply for your crop depends on your soil type. In coarse textured soils with low organic matter content, shoot for about 25 lbs of sulfur per acre (150 lbs/acre of SO4); for finer textured soils with 3% organic matter or more, application rates closer to 17 lbs of sulfur per acre should suffice (100 lbs/acre of SO4).

It’s hard to accurately predict where and when sulfur deficiency will occur, but you can save your yield potential and correct in-season sulfur deficiency with topdress applications of SO4.

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Soil Testing Helps Inform Application Decisions

Soil Testing

Why soil test?

Soil testing is an important part of our philosophy at Calcium Products – without knowing the nutrient status of your soil, how are you to make informed decisions about what to apply to it?

Turf managers are normally good about soil testing, but if you haven’t been consistent about it or have been thinking about starting a soil testing program, now is the time to do so. With environmental regulations being administered in certain areas of the U.S., soil testing will help you maximize your fertilizer investment and make educated decisions on the best type of fertilizers to supply exactly what you need.

What a soil test measures

There are a wide variety of soil tests available that can help you gain insight into your nutrient status, soil type/texture, infiltration rates, water holding capacity, etc.

A basic soil test is likely to provide you with the following measurements:

  • - Soil pH
  • - Cation exchange capacity (CEC)
  • - Phosphorous
  • - Potassium
  • - Calcium
  • - Magnesium
  • - Lime requirement

Additional analyses that may be of interest depending on your location and situation might include:

  • - Soil texture
  • - Total soluble salts
  • - Sodium adsorption ratio (SAR)
  • - Sulfur
  • - Micronutrients

Nitrogen testing is typically not included in all sampling regimens due to its instability, making interpretation of the value difficult.

How to get started

Checking in with your state extension specialist to see what they recommend with regard to appropriate testing methods and preferred laboratories in your area is the best way to ensure you are testing all the right things for your situation.

Finding a lab you are comfortable with and that is regionally appropriate for you is important to maintain consistency and to build a historical database on which to inform decisions. The lab you choose will also offer recommendations on what nutrient levels to supply to bring them back into sufficiency range. You may double check with your state extension specialist to see if the laboratory recommendations are aligned with what they normally recommend.

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