New Field Trial Results for Apples, Almonds, Sugar Beets and Potatoes

Some scale, third party trials results are coming in further demonstrating the agronomic value of the continuous release, plant available calcium and sulfate in SUL4R-PLUS® products:

Honey Crisp Apples

Yield increase to 40.4 ton per acre versus the grower standard of 32.2 ton per acre with decreased incident of bitter pit, increased fruit brix (sugar), increase fruit pressure (better storage), slight decrease in fruit size, increases in leaf nutrient content.


Initial reports indicate an increase in yield of approximately 300 lbs per acre versus the grower standard and material increase in nut size.

Sugar Beets

Increase in marketable yield of 2.7 tons per acre with increased fruit quality (sugar content).


Increase in marketable yield by 22 cwt per acre and increase in storage quality through 10% decrease in Hollow Heart.

Call a SUL4R-PLUS sales rep today or visit to learn more.

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SUL4R-PLUS B+Z Fertilizer Performs on Wheat in Kentucky, Adding $67/Acre More to the Top Line

Recent 2019 trials of SUL4R-PLUS® B+Z product on wheat in Western Kentucky demonstrate the agronomic value of this innovative fertilizer products.

Three side-by-side wheat trials of SUL4R-PLUS® B+Z fertilizer, applied at a rate of 100 lbs. per acre, yielded 15 more bushels per acre than the grower standard. At today’s pricing, this is an increase of $67.50 per acre to the grower’s top line; talk about a ROI! And SUL4R-PLUS B+Z fertilizer can be applied in the fall or the spring.

See the complete summary above of the results of this trial with all four SUL4R-PLUS® products and contact us at to see how the agronomic advantages and superior quality of SUL4R-PLUS® crop nutrient products can help improve your grower’s top line.

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How to determine which pelletized gypsum is right for you

To maximize yield and reach your crop’s genetic potential, it is always time to assess things that work and things that may need to be improved. When determining your calcium and sulfur needs, there are a few areas where you will want to pay close attention when selecting a pelletized or granulated gypsum product. 

What role does pellet size, uniformity and density play?

Pelletized gypsums vary greatly in granular uniformity. There are two ways to measure pellet size, the size granulation number (SGN) and uniformity index (UI). SUL4R-PLUS® products have an SGN of 265 or 2.65 mm that is designed to match other blended fertilizers to make the most homogeneous batch. Most products on the market today ship their product at a UI of 30, From 5 mm to 1.5 mm. SUL4R-PLUS® products have a UI of >50 that means that the large to small ratio is 4 mm to 2 mm or 50%. The larger the UI the more consistent the pellet size and the increased accuracy of blending and delivery, resulting in even feeding and improved ROI. This UI is so tight that it is one of a few products on the market that can be used effectively in air seeders. Further SUL4R-PLUS® products are designed to have a density of 60 pounds per cubic foot that also aids in maximizing blending and spread. 

What roles does particle size play?

Pelletized calcium sulfate dihydrate “Pell Gyp” ingredients vary greatly in raw material particle size, tremendously impacting speed and completeness of reactivity. Particle size dictates how fast that nutrient goes into solution. Finer ground products will go into the soil solution faster than coarsely ground products, which may never fully solubilize but micronized products are the fastest of all. Coarse mined products target the 4 to 10 mesh size so that they can be spread on the field, and some pelletized mined product are ground to (85%) minus 100 mesh (150 microns) but SUL4R-PLUS® fertilizer is 95% less than 325 mesh (44 micron) or +60% increased surface area over 100 mesh materials. The increased surface area allows the SUL4R-PLUS® products to more quickly dissolve into the soil solution making the nutrition virtually immediately available to the crops and the Ca to SO4 bond causes the nutrition to be continually released throughout the growing season and longer.

How do SUL4R-PLUS® products compare?

SUL4R-PLUS® products are produced by a patented process that delivers the highest quality product on the market. Pellet uniformity and particle size matter when it comes to getting the most effective product for your plant’s health. SUL4R-PLUS® fertilizer is manufactured from one of the purest sources of gypsum in the world, making it dissolve and solubilize quickly to improve plant health and soil quality.

Call a SUL4R-PLUS®, LLC sales rep today to learn more about SUL4R-PLUS® products or visit for more information.

The Boron Factor

We often forget about the secondary and micronutrients like calcium, sulfur and boron when planning the crop nutrient program. Calcium, sulfur and boron are essential for nutrient balance and for meeting plant needs but are too often overlooked.

Boron’s most important role is for the cell structure and function of cell division. It aids in growth and development of fast-growing tissue, such as root tips and development of leaf and bud structures. Inadequate boron is observed in plants by a change in the structure of the plant in the fast-growing tissues. Boron adequacy ensures adequate transport of water, nutrients and organic compounds to the fast-growing tissues to promote the plants normal cell division and cell wall development.

Boron’s relationship with calcium is crucial for cell wall structure. Boron’s role is involved translocation of calcium into the plant. Adequate calcium nutrition is as crucial in plants as in animals, calcium in animals promotes bone development similar to calcium in plants promoting cell wall development.

For peanuts, boron is essential for adequate movement of calcium in the plant. A lack of boron which restricts calcium movement in peanuts causes “hollow heart.”

For soybeans, boron improves soybean maturity by enhancing flowering and pod fill during reproductive stages of growth.

Regardless of the crop, cutting back on inputs like calcium and boron is cutting the crop yield potential.  The relationship between calcium is very crucial.

SUL4R-PLUS®, LLC has revolutionized the application of calcium, sulfur and boron. SUL4R-PLUS® BORON fertilizer micronutrient package delivers a potent trio of nutrients – boron, calcium and sulfur – while making nutrition immediately available to hungry crops. With 18% Calcium, 15% Sulfur and 1.5% Boron, it is an optimized micronutrient package – with fast-working nutritional power to deliver immediate and complete nutrition to all crops during the current growing season for macro yields and improved crop quality. And it is soluble as well:

Call a SUL4R-PLUS®, LLC sales rep today to learn more about SUL4R-PLUS® BORON or visit for more information.

And for more detailed information, read this article from Southeast FarmPress.

Longer Lasting Nutrition

SUL4R-PLUS Fertilizer – Longer Lasting Nutrition

SUL4R-PLUS fertilizer maintains adequate nutrient value for over 60 days, while AMS loses all value between day 5 and day 10.

Day #1 of the Texas A&M Sulfur Product Leaching Study demonstrated the leachability of AMS over SUL4R-PLUS fertilizer (everything over the blue lines is lost nutrient value).

In a trial, the darker and taller corn had SUL4R-PLUS fertilizer applied, where the lighter and shorter corn had AMS applied. See that the AMS has leached out!

Let SUL4R-PLUS® products add bushels to your yields. Contact us at to see how the agronomic advantages and superior quality of SUL4R-PLUS® crop nutrient products can help improve your grower’s bottom line.

Follow us on twitter @sul4rplus or LinkedIn for up to date field trial results.

SUL4R-PLUS Fertilizer – Lower Salt Index for Faster Nutrition

The higher the Salt Index number the more that water in the soil is restricted from the seed or plant. To resolve this, the soil needs time and moisture to dilute the fertilizer so that it is safer for the seed or plant. The higher the number, the longer it takes to be plant-safe.

■ AMS has a Salt Index of 88.3
■ SUL4R-PLUS fertilizer has a Salt Index of 5
■ AMS requires time and soil moisture to be plant safe
■ SUL4R-PLUS fertilizer is plant safe and available immediately to the plant

Notice the greater root mass, larger stalk and enhanced maturity based on ear color with SUL4R-PLUS fertilizer.

Let SUL4R-PLUS® products add bushels to your yields.
Contact us at to see how the agronomic advantages and superior quality of SUL4R-PLUS® crop nutrient products can help improve your grower’s bottom line.
Follow us on twitter @sul4rplus and LinkedIn for up to date field trial results.

Sulfur for Plant Nutrition

An inadequate S supply will not only reduce yield and crop quality, but it will decrease N use efficiency and enhance the risk of N loss to the environment. Studies have demonstrated that supplying S to deficient pastures increased yields, N use efficiency, and lowered N losses from the soil. Due to the close linkage between S and N, Schnug and Haneklaus (2005) estimated that one unit of S deficit to meet plant demand can result in 15 units of N that are potentially lost to the environment. They calculated that S deficiencies in Germany may be contributing to an annual loss of 300 million kg of N (or 10% of the total N fertilizer consumption of the country).

Click here to read their article, Sulfur for Plant Nutrition.

Schnug, E. and S. Haneklaus 2005. In L.J. de Kok and E. Schnug (eds.) Proc. First Sino-German workshop on aspects of sulfur nutrition of plants. Braunschweig, Federal Agricultural Research Centre (FAL), p.131.

Learning from the History We Haven’t Read about Sulfur

I remember when I first started out at a retail farm center in the mid-seventies that agriculture was changing rapidly. Soybeans were a new row crop that we knew little about except that we planted them in 38” or 40” rows, put a couple of hundred pounds of a low nitrogen blend of fertilizer in the row, and cultivated them because we didn’t have good herbicides.

At that time, I was working in a large forage area with a lot of beef and dairy animals. The majority of corn that was grown never saw an elevator but was fed to the cattle and hogs either as a ground feed mix from the local mills or as silage in the dairies. 100 bushel to the acre was the magic number for corn yield, and 40 bushel to the acre was the number that we were reaching for wheat and soybeans.

I recently looked back at some soil tests that I still have from the seventies that came from our old Agrico soil laboratory in Washington Court House, Ohio. The seventy or so soil tests I have from that time showed no deficiencies of sulfur. As a matter of fact, all were sufficient or high. The universities did not even test for sulfur and for good reason………we were getting plenty from our power plants before the scrubbers were installed to clean up sulfur emissions, and from our cars, trucks, and tractors before we had catalytic converters and low sulfur fuels. Then we started to hear about acid rain which was killing our forests and polluting our atmosphere.

Fast forward 40 years and we are not getting free sulfur any longer. During my last five years at a retail farm center, 97% of soil tests have come back low or deficient in sulfur. This rate probably would have been even higher but some of my soil tests included burley tobacco in which the majority was required to use sulfate of potash. Our rates of applied nitrogen are doubled now compared to the seventies, and when you use a 16-20 to 1 ratio of N to S, that means the removal of sulfur is a lot greater than in the seventies.

So where do we get sulfur if it is not being supplied to us as it was then? Is sulfur (which is removed as pounds per acre), crucial to the production of today’s crop?

Sulfur is very essential to today’s agriculture and there are many in the agricultural community believe it should be the “fourth major nutrient,” behind nitrogen, phosphorus, and potash, and I do not disagree. Protein production will suffer, especially in our needed protein crops without sulfur. Nitrogen will not be as efficient in the plant without sulfur. Chlorophyll production will not occur as it should in the plant without sulfur, and a lot of our soil microorganisms cannot function in the soil to promote the feeding of the plant without sulfur.

SUL4R-PLUS® products are a good and efficient way to provide the sulfur that is needed in agriculture today. SUL4R-PLUS products are in the sulfate form that the plant requires, and because the calcium nutrient is also contained in the granule, it is slowly released when the plant needs it.

Is all sulfur the same? I will be quick to tell you that elemental sulfur will probably not get released to the plant in the same year it was applied. Other sulfates, such as AMS, are so apt to leach that they could be gone in as short as 5-10 days (Texas A&M study – Dr. Mowrey).

Harry S. Truman once said, “The only thing new in this world is the history we haven’t read.” History shows us that we once got all the sulfur we needed. Now we know our sources of sulfur are no longer available and we have to supply it! We must recognize the need for a good source of sulfur for our crops if we are to be efficient and productive. SUL4R-PLUS products are what I, the Crop Doctor, prescribe.