The objectives of this project were two-fold:  1. Demonstrate cattle can be pastured with a low cost per pound of gain on bermudagrass pasture by using legumes instead of nitrogen fertilizer, and 2. Determine the most suitable legume species for south central Oklahoma.  This project was conducted between 2003 and 2006 on the Noble Foundation Headquarters Farm in Ardmore, OK.  Lime was applied prior to the study to adjust soil pH.  Soil test potassium was adequate and phosphorus fertilizer in the form of 18-46-0 was added according to soil test recommendations for each pasture each fall.  The grass base was bermudagrass with some volunteer cool season annual grasses.  Various legumes, including alfalfa, arrowleaf, crimson, red and white clovers and hairy vetch, were established using a no-till drill in 2002 and 2003 to evaluate their persistence.  Cattle were rotated on four paddocks, later split into eight, and moved so that pastures received about fourteen days of rest between grazing.  Over the four years of this study, average grazing days (GD) per acre (ac) per year (yr) were 153.  The average grazing season length was 140 days/yr usually from March through July.  There were more GD than days in the season due to stocking slightly more than one steer/ac.  Average weight of the grazing steers was 615 lbs.  Average beef production was 292 lbs of gain/ac/yr or 1.91 lbs of gain per head per day.  Production costs were 17.7 cents per pound of gain.  These costs included supplement, phosphorus, lime, seed and application and planting expenses.  Acceptable gains were produced at an acceptable cost using hairy vetch and Patriot and Durana white clover which have persisted and remain productive.