If you’d like to create new maps from previous soil test data, there are a few good options depending on your comfort level with data tools. You can start by importing your soil test CSV file into a spreadsheet. From there, you can add additional columns for any variables (yield goal for example) required by your preferred fertilizer equations.

If you have coordinates for each sample location, you can match those rates to their coordinates and use GK ADMS to interpolate and generate maps. Working with the soil data and equations in a spreadsheet gives you full flexibility. 

For a straightforward set of equations you can apply directly to your soil data to generate ready-to-use fertilizer recommendations, refer page 35 of Tri-State Fertilizer Recommendations.