Field Corn and Wheat Response to an AgrowsilŽ-Gypsum Blend.

In the Northeastern United States where soils are often acidic, liming is common practice to adjust soil pH to within suggested ranges for optimum field-crop growth.  AgrowSil® is a product that not only adjusts soil pH similarly to other liming materials, but also offers a cost effective means of supplying soluble silicon (Si) to meet soil and plant needs.  But basing Si application rates on the calcium carbonate equivalence (CCE), frequency of lime applications (usually every 3-5 years) or crop soil pH requirements can restrict the ability to provide an ample and continuous supply of Si to meet crop production needs. 

In addition to the need for Si, recent soil tests within the Midwest and Eastern United States have revealed increasing Sulfur (S) deficiencies from decreased atmospheric S deposition.  A means of supplying both Si and S to crops with minimal soil pH altering effects was pursued.  A pilot study was conducted on field corn (Zea mays L.) and winter wheat (Triticum aestivum L.) in Western Pennsylvania to evaluate crop yield response, soil test parameters, and plant nutrient uptake in response to a single spring broadcast application of an AgrowSil®-Gypsum Blend.  The results of this pilot study will be presented.