I started with same ph, twice your CEC, half your OM and had low nutrients. I spread 2-3 tons/ac lime in Aug that year with no tillage except in 2 small plots. My ph has remained 6.5 or better since for 9 years in all my present plots and fields except one bottom plot that just dropped to 6 this year. Part of that key is preserve soil as best you can and use crop rotations that tend to enhance the soil as opposed to drain it, i.e., LC rotation for the most part.