The whole goal of soil sampling is to make a fertilizer recommendation for crop production. To provide the recommendation calibration studies are done with the soil test to measure crop response. For Ohio, the Tri-state fertilizer recommendations provide the calibration study history for recommendation development. For more information on the Tri-state Fertilizer recommendations or developing a soil sampling strategy are provided at http://agcrops.osu.edu/specialists/fertility/fertility-fact-sheets-and-bulletins
An updated version of the OSU Excel spreadsheet that can be used to generate lime, phosphorus and potassium recommendations is now available on-line. The tool is version 2014-1 published 5/2014. The spreadsheet can be found at the link http://agcrops.osu.edu/specialists/fertility/fertility-fact-sheets-and-bulletins/TriStateFertCalcV2013-4.xlsm. Other fertility related information factsheets and bulletins can be found at http://agcrops.osu.edu/specialists/fertility/fertility-fact-sheets-and-bulletins
The Pike County Extension Office no longer does soil testing, but rather, works closely with the fine individuals at Spectrum Analytic. If you have a sample that needs examined, check out their web site here: http://www.spectrumanalytic.com. Once you receive results, contact our Ag educator, Jeff Fisher, for interpretation and recommendations for your best soil!