Adding FieldSaver 90, or a similar product will drive the sand content down to a typical recreational range while assisting to raise the SCR (Silt to Clay Ratio)
Here were the steps:
Topdressing the FieldSaver 90 Amendment
Tilling in the FieldSaver 90 Amendment
Rolling the Infield
After Initial Laser Grading
Final Cross Section of the Infield Mix Profile - You Can Amend an Infield
In conclusion, an infield can be amended, but you need to know 2 things:
1. What does you existing material consist of - pull a sample and send to an independent soils lab
2. Blend an amendment into the profile at a 3-4 inch depth that will "balance" an infield - in this case a 90% silt/clay product.
Go to j-dturf.com to learn more about J&D Turf.