The 50 lb Lime Athletic Marker is a versatile and finely ground, non-caustic pulverized limestone, primarily used for marking athletic fields. This product is safe for use around children and animals and does not harm grass. It also helps raise soil pH levels, which can improve soil health and promote better grass growth. Whether you're marking football, soccer, and baseball fields or adjusting soil pH in gardens and lawns, this lime marker is the solution.