Have you ever had trouble calculating the cost of your fertilizer applications? Don’t worry. You are not alone.

University of Tennessee Extension reminds producers that a fertilizer cost calculator is available online for their use. The tool was developed by the UT Agricultural and Resource Economics Department and is an Excel-based calculator. It can evaluate the cost of applying varying levels of fertilizer and using various products. The calculator should be used as a tool (along with a soil test) to evaluate estimated costs per acre for fertilizer.
The only fields in the spreadsheet which can be changed are:
1.      Price per ton for Urea, Ammonium Nitrate, DAP and Muriate of Potash
2.      Application rate per acre of (N,P2O5, and K2O) - example (60-30-30 or 60-0-30)
3.      Application costs per acre ($/acre) - this may be a charge/acre to be truck spread, or a buggy rental fee prorated on a per acre basis.
For traditional standard blends of fertilizer (6-12-12 or 19-19-19) application rate would be adjusted by the number of pounds planned to apply per acre. Example: 200 pounds of 19-19-19 per acre would have the application rate of 38-38-38 and 300 pounds per acre would be an application rate of 57-57-57.
A current soil test will assist you in evaluating the feasibility of applying a standard blend of fertilizer.
To download the fertilizer cost calculating tool, visit the website: http://economics.ag.utk.edu/fertilizer.html
For more information about fertilizer rates and recommendations and soil tests, please contact your local county UT Extension office.
UT Extension provides a gateway to the University of Tennessee as the outreach unit of the Institute of Agriculture. With an office in every Tennessee county, UT Extension delivers educational programs and research-based information to citizens throughout the state. In cooperation with Tennessee State University, UT Extension works with farmers, families, youth and communities to improve lives by addressing problems and issues at the local, state and national levels.


Tammy L. McKinley, 865-974-7271, mckinley@utk.edu