Do you have soil test results as a geospatial points? 
If so, you can create smart VR map based on them and field potential zones (calculated taken into account historical productivity, topography, OM levels, up to you to add more factors). 


You can utilize formulas from your agronomis/ nearest ag university https://geopard.tech/blog/equation-based-analytics-precision/ 

Feel free to reach me out for a free trial/field or just register here app.geopard.tech .