ROCKSPRING (Centre Co.) Visitors can compete in a “largest weed” contest, learn from police officers about farm road safety, watch antique farm equipment demonstrations, or see some cutting-edge inven tions and innovations from Penn State researchers at Ag Progress Days, Aug. 15-17. The event highlights Penn State’s role in creating break throughs in science and technol ogy. Sponsored by Penn State’s College of Agricultural Sciences, Ag Progress Days is conducted at the university’s Russell E. Larson Agricultural Research Center at Rockspring, near State College. Visitors seeking a challenge can wander down to the Crops and Soils Tent. Instead of pull ing pesky weeds, gardeners and farmers can bring in two of their largest weeds and try to win the “Largest Weed in Pennsylva Progress Days To Open Aug. Ag nia” contest. Visitors can enter two weeds that have been grown in Pennsylvania. All entries must be cut off at ground level. There are two categories: broad leaf and grass. Prizes are awarded daily. Nearby is the ex panded “A-Maze-N Com,” a com maze where brave visitors can spend a few minutes or sev eral hours testing their sense of direction. The college’s exhibit, “Inven tions and Innovations,” focuses on several inventions from Penn State researchers that created usable products for Pennsylva nia businesses, as well as exam ples of how College of Agricultural Sciences research ers adapted and improved exist ing technologies. “Most people believe the hardest work is thinking up an invention,” said George Hamil ton, senior lecturer in agronomy and inventor of the turfgrass product Penn Mulch. “This ex hibit will show how Penn Staters work through a long process to bring new technology to the market.” The College Exhibits Building will feature a display on Hamil ton’s Penn Mulch, a self contained mulching product for use on lawns and gardens. Penn Mulch, also sold under the trade name Emerge, created a new product category for lawn and garden retailers. Another turfgrass-related in novation centers on creating grass athletic field turf surfaces literally overnight. Working with DuPont Inc. and Hummer Athletic Fields, Andrew McNitt, assistant professor of turfgrass science, helped research and test Grass Tiles, a stadium turf system that lays squares of grass over asphalt surfaces to form a full-size athletic field. Visitors can see the machines used to lay Lancaster Farming, Saturday, August 12, 2000-A23 the grass squares, as well as test ing equipment used to simulate football games and other types of wear. Visitors can see high technol ogy in an eggshell at a display featuring a Penn State invention that perfected the process of separating eggshells from the thin protein membrane within the shell. By separating these materials, an egg-processing company can recover salable calcium from the eggshells and collagen from the shell membrane. Joseph Mac Neil, professor emeritus of food science, will demonstrate the original prototype he used to create a technology now used by Cutler Eggs, a Philadelphia egg processing company. Other displays will focus on a computer model called CIM PSU, which uses economic in formation to predict the effects of bringing new businesses into a 15 community or to determine how the closing of a major business will affect the economic health of a town. Farmers and suburban com muters will get a chance to see how to operate farm equipment safely on public roads. Officers from the Northern York County Regional Police Department will deliver a seminar on safe farm vehicle operation methods. The seminar is at 11 a.m. and 2 p.m. Tuesday and Wednesday in the College Building Theatre and at 11 a.m. and 2 p.m. Thursday in the adje'cent College Building Tent. Safety-minded visitors also can drop by the College Build ing Tent to see youth compete in the Farm Safety and Health Quiz Bowl on Wednesday. 4-H competitions start at 9 a.m. and FFA teams compete at 1 p.m. In the days before motorized (Turn to Pago A 26)