Soil gets scored on the pH scale with a pH of 1 being the most acid and pH of 14 being the most alkaline.
Most grasses enjoy growing in a slightly acid soil with a pH of about 6.5 to 7.0. Soil in western Pa. is typically highly acidic. Liming helps to balance your soils pH.

Advantages of balanced
                        soil pH...

Nutrients in soil are more readily available in grass plants

Greater response from fertilizer application

More microorganism activity to help decompose thatch

Decreased chance of toxic substance uptake by grass plants

Reduced incidence of some turf diseases

Increased turf vigor to crowd out weeds and resist insects

Better overall turf quality

Promotes deeper rooting which increases drought tolerance