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Fluid Fertilizer Compatibility Chart

Compatibility of various materials used in the production of fluid fertilizers is a concern for all of those in the fluid fertilizer industry. Formulation guidelines, compatibilities and salt-out temperatures exist for more conventional fluid products made from UAN solution, urea, potassium chloride, ammonium polyphosphate and to some degree orthophosphate products. Much of this information was developed by the TVA-National Fertilizer Development Center (NFDC), in conjunction with the fertilizer industry, in the 1960’s through the early 1980’s. Unfortunately, the same level of information does not exist for products such as ammonium thiosulfate, potassium thiosulfate, calcium nitrate, ammonium chloride, potassium nitrate or any of the many other materials utilized by the fluid fertilizer industry.

This past winter, several Fluid Fertilizer Foundation members with vast experience and expertise in fluid fertilizer formulation contributed their knowledge to the development of a Fluid Fertilizer Foundation compatibility chart. Initially, this chart was first introduced for review at our Fresno, CA Fluid Technology Workshop held this past December. Since then, several refinements and additions have been made that fill in some of the gaps present in the initial chart. This chart should include most of the materials used in the fluid industry across the country. Please feel free to download this chart from our Fluid Fertilizer Foundation website.

Since the completion of the compatibility chart project, several members have requested that we put together a compatibility chart for the various forms of micronutrients used in the industry. While very limited information from several sources exists – we will again be dependent on the expertise, experience and knowledge of our members. Hopefully we will have an initial version available for review by this winter.

Click here for a larger view of this chart.