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What are the two types of gypsum; which to choose?

When choosing gypsum it has to be a calcium sulfate di-hydrate (CaSO4*2H2O). This form of gypsum is by far the most soluble form available. Let’s take a second to review the two major forms of gypsum in the marketplace today in lawn care. The first form is what I mentioned above, calcium sulfate di-hydrate (CaSO4*2H20) and the second form is simply calcium sulfate (anhydrite) (CaSO4). You’re probably thinking, ‘what’s the big deal, gypsum is gypsum and after all it’s only a commodity.’ But there actually is a huge difference. One is very fast acting and extremely water-soluble; the other is not. The di-hydrate form is what you need to look for. This type of gypsum is already infused with two extra molecules of water making it easier to break down.  This makes the nutrients available to the plant as soon as it dissolves into solution; with some brands that’s only…

Calcium Products sponsors Iowa FFA Soils CDE

  Calcium Products is excited to announce that in partnership with the Iowa FFA Foundation, we will be sponsoring the Iowa State FFA Soils Evaluation Career Development Events (CDE). “As an alum of FFA, I have been looking for an opportunity to get Calcium Products involved with FFA. When the Iowa FFA Association called and said it had been a couple of years since they had a sponsor for the soils CDE, we knew we had to help out,” said Craig Dick, VP sales & marketing at Calcium Products. Agricultural Skills CDEs are held throughout the year, starting in April at the FFA State Leadership Conference and ending in October with the State FFA Soils CDE. Through CDEs, FFA members are recognized for their knowledge, problem solving and achievement of skills in Iowa FFA Career Development Events. These events are a critical part of the Ag Ed three circle model allowing students…

An update on the Iowa State University recreational soccer project

In the fall of 2012, I was still working part time with Iowa State and the newly seeded athletic fields built the previous year were in need of attention for weak, spotty growth. Dr. Dave Minner, myself, and Brent Cunningham (of rec services at ISU) all went over what took place during field construction (an outside contractor built the fields) to try and determine why the newly seeded grass wasn’t growing like it should. The one thing that stuck out to us was the use of compost from the ISU dairy farms that hadn’t been tested prior to application. Using compost is a great way to build soil structure and organic matter, however, if it isn’t completely composted, it can contain high levels of soluble salts harmful to turfgrass growth. We took a handful of soil samples and sure enough, there were high levels of K, Mg and Na, some…

SuperCal SO4 Success

Recently, we received an update from a cooperator involved with our ‘Prove It’ strip trial program. SuperCal SO4 was applied at 200 lbs/acre this spring to a farm located in northern Iowa in advance of corn planting and the results so far are visually stunning.  Sulfur is increasingly being recognized as the fourth major plant nutrient after the “big three” of N, P and K. Its importance in agriculture is becoming more widely accepted as the supply of S in older fertilizer/pesticide chemistry and that supplied from the atmosphere can no longer be counted upon.  Low levels of sulfur in the soil limit the efficiency of added nitrogen, which means if you are applying more N to overcome yellow plants and slow early season growth, you throwing your money away. Nitrogen and sulfur deficiencies are commonly confused, but sulfur deficiency is easily identified by yellowing of the upper leaves (as…


Maintained by Craig Dick, blogronomist and VP of Sales and Marketing, we have a wide array of blog articles from Craig and some expert guests on topics related to soil and crop health, farming and growing tips, and so much more. If it’s not here, ask us!

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