Kentucky farmers can purchase a more finely ground limestone than they could 1 year ago.
The Department of Agronomy, Agricultural Experiment Station, University of Kentucky, recommends that agricultural limestone be ground fine enough that at least 45 percent will pass through a 50-mesh screen. This is equivalent to the old recommendation that at least 40 percent pass through a 60-mesh screen.
Corder, George D., "Finely Ground Agricultural Limestone Is Available" (1966). Agronomy Notes. 208.