It's the buffering capacity of the soil that makes all the difference.

In sandy soil - 2 ton/acre of lime can move the Ph up a full point - but not move it at all In heavy clay.

It is just to too tough to talk in general terms - how much lime to apply without all the details.

In some soils - it just doesn't pay to try to raise the Ph to some Clover or Alfalfa levels- you might better plant BFO or Rye. Or apply enough Lime to plant an acid tolerant White clover. In 6 years - I have not been able to grow Alfalfa - even with decent Liming in some spots. I concentrate on clovers as a result.