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Northern Ohio Grain | https://www.extension.purdue.edu/extmedia/AY/AY-9-32.pdf
This is the Tri State Fertilizer guide for Ohio, Indiana and Michigan. Not sure if it follows the guidelines/recommendations up north, but if you look at page 11 of the guide, it gives the forumulas you are looking for.
Example:
Buildup
for K: lb K2O/A to apply = [(CL - STL) x ((1 + (0.05 x CEC))] + (YP x CR) + 20
Edited by steiner43511 8/31/2016 13:28
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Soil test results
