Calcium Products - Items filtered by date: August 2013
Calcium Product 98G


Calcium Products - Items filtered by date: August 2013

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Calcium Products: The Soil Specialists


According to vice-president of sales and marketing Craig Dick, Calcium Products offers an array of soil improvement products for farmers looking for results-driven, margin-increasing solutions.  Dick says their products are the most pure and effective solutions you can buy for controlling pH, compaction, crusting, water management and nutrient availability.   And he says Calcium Products has recently launched a new web site with product information and custom calculators, agronomy research, stories of real results and much more.


Gypsum is gypsum . . . right? Wrong.


Gypsum is gypsum…right? Wrong.

Gypsum is just gypsum and any will do, right? Wrong! Just like any product in the marketplace, there are high quality and low quality gypsum's and the adage of you get what you pay for is absolutely true.

Gypsum is a very misunderstood amendment; most people don’t understand the value. Before I talk about how the quality of gypsum can affect its effectiveness, let me give you a general overview of the material.

Gypsum comes in two different forms, both of which can be used in the turf industry. The first is calcium sulfate anhydrite and the second is calcium sulfate dihydrate. As you can read, both forms have both calcium and sulfur as part of the elemental make-up. The difference between the two, however, is directly tied to its effectiveness and that difference is water! The second form, calcium sulfate dehydrate, has 2 additional water molecules associated with the calcium sulfate crystal. It is these additional water molecules that make the elements of calcium and sulfur available to the plant within hours, opposed to days or weeks with the anhydrite form. For additional detailed information on the difference between the two forms, check out this video by Pace Turf.

Hopefully after watching the video you now understand that the ONLY gypsum you should use is the dihydrate form; now it is up to you to find the best form available.
By law, all gypsum bags must have a product analysis printed someplace on the bag. It will look something like this:

Guaranteed Analysis:
Ca (calcium)……………………………………………..#%
S (sulfur)…………………………………………………#%
CaSO4-2H2O (calcium sulfate dihydrate)……#%
Derived from: calcium sulfate dihydrate

The most important line in the analysis is:
CaSO4-2H2O (calcium sulfate dihydrate)……#%.

This is the line that will show you the purity or the quality of the material. The closer that percentage is to 100%, the more effective and efficient the gypsum is for your particular application. As that percentage gets further away from 100% the more material you will need to apply to maximize the nutritional value of the gypsum.

Another major factor in your selection of gypsum had to do with the fineness of the particle that makes up the gypsum in the bag. So what does fineness mean? Fineness has to do with how small the raw material is crushed to and how much can pass through a mesh screen before it is bagged or pelletized then bagged.

Side note: there are various mesh screen sizes. For example, if the screen size is 10 mesh, that means there are 10 holes for every square inch. If the screen size is 200 mesh, it means there are 200 holes for every square inch. Remember, the higher the mesh size the smaller the particle has to be to pass through.

I added the side note is because particle size is directly related to the efficiency of gypsum. The smaller the gypsum becomes the more surface area it will cover. This is important because if you can cover more surface area with less product, you are maximizing the value of the application. The fineness can be found on the bag alongside the analysis.

There are a lot of options in the marketplace for gypsum and to the less educated user, it’s all the same. Now you know why that isn't true. Turn over the bag now that you know what to look for. Check the analysis and mesh factor to make an educated decision. Trust me, your soil will thank you for it and, hopefully, you’ll thank me too!



Jeff Thompson, Vice President of Sales & Marketing

Jeff joined Calcium Products as Vice President of Sales and Marketing in 2015. Prior to Calcium Products, Jeff developed and grew the Iowa sales territory for Specialty Fertilizer Products (SFP), now Verdesian Life Sciences. He spent 10 years at Channel Bio starting as a district sales manager progressing into leadership roles managing all aspects of a sales team – recruiting and coaching people in sales, marketing, customer service and distribution. Jeff started his career at FC Coop, now Landus Cooperative, in Iowa in 1996 as a feed and livestock marketing specialist. Jeff has a bachelor’s degree in agricultural education from Iowa State University and is an active member in his family farm near Winterset, Iowa.

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Super Bowl Weekend

During Super Bowl Weekend, our loading hours at the Gilmore City & Fort Dodge locations will be reduced.  We will be loading till 5 PM on Friday, January 30th and reopening Monday, February 2nd at 5 AM. 


SuperCal SO4 on Alfalfa Yield

SuperCal SO4 on Alfalfa Yield

Location:          Hollandale, MN - 20 Acre Field

Date:               1999

Crop:               Alfalfa - 99-64220

                       Planted @ 16 lbs/acre

Treatments:      SuperCal SO4 applied at 300 lbs/acre

                       Applied March 16, 1999

                       Six replications



Do you know where your lime and gypsum come from?

There are a lot of companies that claim to have the best product on the market but can those companies stand behind that product 100% without being the manufacturer?

We can say without a doubt our products are the best. Calcium Products, Inc., takes pride in the fact that our products are milled, formulated, bagged and distributed, by us, to all points across the U.S.  and Canada. In addition to the Calcium Products bags, look for our product next year in a new line of products for homeowners, Pure Elements. If you want to make sure you are getting the best, look for the name Calcium Products or Pure Elements on the bag.

Calcium Products has the purest, cleanest, fastest-acting, most efficient limestone and gypsum on the  market today. If anyone tells you their product is better, ask them where they source their materials.



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 a matter of minutes. The anhydrite form does not have any water associated with it and therefore is very hard to break down into solution, sometimes taking years to begin working.

Now that we know the two major forms of gypsum on the market today; now you should know how to figure out which type is which. The info can be found on the back of most bags. The following is what you want to see:


Calcium sulfate di-hydrate (CaSO4*2H20)……92%
Derived from naturally mined calcium sulfate di-hydrate.

Don’t let the levels of calcium on labels fool you. The anhydrite forms will contain upwards of 30% calcium, but they are not soluble and do not break down fast enough to be effective. If the calcium is not available to the plant, it doesn’t matter how much calcium or sulfur is in the gypsum.


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