I had to ponder this one for a while before posting.
It seems to me that the original posting caused a confusion by not really discussing usage background. As was answered, if the intent of using the fertilizer was for agriculture then changing the pH would best be done after the application of the fertilizer to the soil.
@TyPie
Lime and Limestone - Is it not true that lime is produced from limestone? And, do people in the agriculture arena sometimes use the terms as generally meaning the same stuff?
@Zyklonb
Sodium bicarbonate (Baking soda) [or even Sodium carbonate (washing soda] would probably work, but not my first choice for replacement of lime in an agriculture situation. My thinking would be more along the lines of wood ashes.