Since your soil is acedic you dont need to add gypsum. Rather choose neutral or slightly base forming fertilisers like SSP, urea, DAP, MOP etc.
Your soil is too low in organic carbob, improve it by adding compost, vermicompost, neem cake etc.
Give humic acid as drench or through drip for any of the crop you grow.
For details 09480557634
Regards
Harish
Mysore