Nice Soil in three type...fine, medium and coarse... FDD for medium and coarser soil accurately can not be computed by your formula... Hence if possible developed the software for medium and coarse soil FDD also.
Great engineering application for on site testing and quality control.
Thanks for the update.......
Simple and straight forward
Works great. I think you should fill all entries even if it's zero.
Works great. Congrats eng.
Improving UI design.