On what crops can we use SUL4R-PLUS® fertilizer?

SUL4R-PLUS granular calcium sulfate is suitable for all crops that require a highly available source of sulfur or calcium including corn, soybeans, winter and spring wheat, alfalfa, potatoes, vegetable crops like tomatoes, sugarcane, canola, edible beans and many more.

How does SUL4R-PLUS fertilizer compare to elemental sulfur?

SUL4R-PLUS fertilizer is already in the sulfate form. Elemental sulfur requires microbial action to convert to the sulfate form before it is taken up by the plant. Moderate temperatures and adequate but not excessive moisture are necessary for microbial activity, so winter and early spring conditions do not favor breakdown of elemental sulfur to the sulfate form that is useful to the crop. Elemental sulfur also lowers soil pH and may not be available to the plant in the same year it is applied. SUL4R-PLUS fertilizer is already in the sulfate form, so it is plant available throughout the spring.

Can I use SUL4R-PLUS fertilizer in fall?

SUL4R-PLUS fertilizer can be used in the fall, but keep in mind that a sulfate form is leachable and you will lose some sulfur especially in sandy soils. We recommend you follow best practices and the 4 R’s of nutrient management when applying all fertilizers. We have customers in the upper Midwest that blend SUL4R-PLUS granular calcium sulfate with their dry P and K fertilizer for their fall applications.

Have you conducted field trials and if so what results have you experienced?

Our field trials are on-going and we add to our findings every season. Growers have experienced a significant return on investment using SUL4R-PLUS fertilizer. For example results have shown that for every $1 per acre investment growers get back $3 per acre on corn. Results vary, so talk to one of our sales representatives for a list of field trial results and testimonials.

Can SUL4R-PLUS fertilizer help to lower high magnesium levels in the soil?

The answer to the question in short, is yes, SUL4R-PLUS fertilizer does have a role in helping to lower higher mag levels. The 21% calcium (a key constituent of SUL4R-PLUS calcium sulfate) is a cation, just like magnesium. When magnesium levels are high, a strategy to reduce them is to apply calcium (or potash, another cation) aggressively to bring the soil into balance and lessen the magnesium levels. Key base saturation levels for Ca are 68%, Mg 12% and K 3%. These numbers will be stated on any soil test. In terms of soil conditioning, calcium is proposed as a means of improving soil flocculation or the “flaking” effect of clay particles in the soil solution. Flocculation therefore allows the soil colloids to be free in the soil solution, not bound together and available for nutrient exchange. We would encourage use rates of 300 lbs per acre (repeated over 2-3 years) to see an effect from the applied calcium.

I am currently using pelleted lime for the calcium content – how much SUL4R-PLUS fertilizer should I use?

Both products are approximately 21% calcium, but the calcium in SUL4R-PLUS fertilizer is much more available due to the fineness of grind. Ohio State University publications state that the calcium in calcium sulfate products is 200 times more available to the crop than ground limestone.

How much SUL4R-PLUS fertilizer should be used on tobacco crops?

It really depends on your soils and how you manage your crop. As growers and acreage per grower increase, more and more farmers are using muriate of potash in the fall instead sulfate of potash in the spring. Muriate is cheaper and the salt issue is reduced by spring. Tobacco likes both calcium and sulfur so if you are using muriate, you will be dependent on a product like SUL4R-PLUS fertilizer in the spring to supply the sulfur. SUL4R-PLUS fertilizer provides both sulfate (17%) and calcium (21%) and is more efficient than spreading limestone in a separate and expensive trip across the field. We recommend 200-300 lbs per acre of SUL4R-PLUS calcium sulfate.

How much per acre is being used on vegetable market in South Florida for calcium and sulfur?

South Florida has a wide variety of high input/value crops and for the most part they are using 100 to 500 lbs per acre. Because of their crops and soil content they value the calcium as much or more than the sulfur. Many soils have a high pH and adding more limestone as a source of calcium would raise pH even further. For these acres, SUL4R-PLUS fertilizer is a natural fit.

Where can I buy SUL4R-PLUS fertilizer?

SUL4R-PLUS granular calcium sulfate is available in the U. S. and Canadian marketplace. We also export to Latin America. Check out our web-site, SUL4R-PLUS.COM, call 1-844-822-8385 or e-mail us at INFO@SUL4R-PLUS.COM.