From the February, 19th issue of Changing Agronomy by Midwest Independent Soil Samplers.

"The (basic) soils in our region have a clay base and a common pH range of 7.0-8.2. Different clay types will determine a soils surface area, and likewise, soil-type dictates a soils cation exchange capacity. These physical properties (soil particle size) can directly impact the nutrient variability we experience in southern MN as compared to other parts of the north central region. The more sodic soils experience swelling and/or low permeability. Gypsum applications are often used to help amend these soils by exchanging sodium with calcium to enhanceleaching through the soil profile."

Our friends at CPS in East Chain and FC in Rake have for years been showing farmers that soils in this region will respond and are getting great results with SuperCal SO4.
 

Thanks to Paul for sending this our way!

Yield Starts Here is a blog for farmers, focusing on increasing yield and profitability by focusing on the soil. It is managed by Craig Dick, a Blogronomist and Sales and Marketing Manager at Calcium Products. Find other articles by Craig and guest writers at http://blog.calciumproducts.com/ .