Soil Solutions, LLC


PRO CAL 40
Calcium Sulfate in the form of PRO CAL 40® is unique in that it can perform in all three categories of soil treatment: As an amendment, a conditioner, or as a fertilizer.

 Soil Amendment
  • Alkali Soils
    As a soil amendment PRO CAL 40 is the preferred product for reclaiming sodic or alkali soils since it provides calcium for releasing the sodium and sulfate sulfur for leaching it out of the root zone.
  • Acid Soils
    PRO CAL 40 has also been used in acid sands as a liming material by providing a more soluble form of calcium to the acid subsoils. Under normal conditions, however, calcium sulfate has little effect on raising pH.


  • High pH Soils
    In soils with high pH's (> 8.0) bicarbonates and carbonates increase (either from irrigation water or from subsoil drainage). Calcium Sulfate is an excellent and inexpensive source of soluble calcium that will react with the carbonates to form lime. This, in turn, lowers the pH.

Soil Conditioner

As a soil conditioner PRO CAL 40 has been proven to improve soil structure by providing calcium as a binding agent to improve aggregation of clay particles and to increase microbial activity which in turn provides "glue products" that hold soil particles together. Soils become more friable and top soil becomes deeper.

Soil Fertilizer

As a soil fertilizer, PRO CAL 40 provides almost equal amounts of calcium (23%) and sulfur (17%). Sulfur is mobile in the soil, however, PRO CAL 40 slowly releases its sulfur making it available over many years. PRO CAL 40 is an excellent slow release source of calcium as well. Even in high pH soils soluble forms of calcium can be low due to the propensity to form lime materials.

PRO CAL 40 for Lawn Care!!
PRO CAL 40 can be applied for lawn care purposes ranging from residential to commercial. Don't over fertilizer that lawn! First, apply PRO CAL 40 to ensure that the soil is rich and all available nutrients are at your plants thirsty root tips.

Brochure available for - Improve your Lawn with PRO CAL 40
More information on PRO CAL 40® available in this .pdf file
PRO CAL 40.pdf
  • What is PRO CAL 40
  • PRO CAL 40's uses
  • Application Rates


303 Lamp Kastner Drive * Holstein, IA 51025 * (712) 368-4770