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Agronomic Crops Network

Ohio State University Extension


Soil Amendment and Foliar Application Product Evaluation Trials Summary

In 2016, the Soil Fertility Lab at Ohio State offered a third party evaluation of proprietary soil amendments and foliar applications aimed at improving the mineral nutrition and productivity of crops. This service intends to provide timely and unbiased information on these products for farmers. In 2015, we tested submitted products from the following companies:

  1. AgZymeĀ® by Ag Concepts
  2. BAM-FX by Zero Gravity Solutions

Methods: Corn and soybean trials were planted at three sites on Ohio State University Research Farms: 1) Clark County at the Western Agricultural Research Station in S. Charleston, 2) Wayne County at the Ohio Agricultural Research and Development Center in Wooster, 3) Wood County at the Northwest Agricultural Research Station in Custar.

Data collected include: 1) Complete soil sample analysis prior to planting, 2) Emergence counts at V5 for corn and soybean, 3) Whole plant sampling at V5 for total biomass and complete nutrient analysis, 4) Leaf sampling at R1 for corn and soybean for complete nutrient analysis, 5) Final stand counts at maturity for corn, and 6) Harvest grain yield with complete grain nutrient analysis.

Results: Across all three sites, no consistent trends were found with any of the tested products. No products significantly affected a measured property at more than 1 site. For both corn and soybean, no product treatment yielded significantly greater grain than the control. This was only one year of field data, so interpretations should be made with caution, especially considering the dry weather encountered in the 2016 field season.

The summary report can be found here:

For 2017, we have adjusted our pricing for this service, collecting less data but hopefully making the service more affordable to vendors and retailers. If you are interested in enrolling your product, contact Steve Culman at, or visit

Crop Observation and Recommendation Network

C.O.R.N. Newsletter is a summary of crop observations, related information, and appropriate recommendations for Ohio crop producers and industry. C.O.R.N. Newsletter is produced by the Ohio State University Extension Agronomy Team, state specialists at The Ohio State University and the Ohio Agricultural Research and Development Center (OARDC). C.O.R.N. Newsletter questions are directed to Extension and OARDC state specialists and associates at Ohio State.