The ROPS, or roll-over protection system, is the most important safety feature on a tractor. Get free tractor safety tips in this free video on tractor operation. Expert: John Ryan Contact: www.rcotractor.com Bio: John Ryan works for the family-owned RCO Tractor in Austin, Texas. The roots of the company date back to the mid 1900's and they provide Texans with farming and ranching equipment. Filmmaker: Mark Bullard