Bronc riding toward the rigging handle, spurring at each jump in rhythm with the motion of the horse. Bareback bronc riding began to develop as a professional rodeo sporting event around 1900. The riding equipment used during that era varied. In some cases, the rider simply held onto the horse's mane, called a mane-hold. Others held a loose or twisted rope tied around the horse's girth, and other methods involved using multiple handhold leather riggings based on a surcingle. In the early 1920s, when the old rodeo rules allowing two handed riding were being phased out and replaced with the newer rule
Tree girth measurement of the tree. In these cases the measurement should be taken there and the height above the base of the tree noted. Some trees have branches at or lower than a height of . Since the purpose of a girth measurement is to get a full measure of the tree’s trunk, measurements should be taken at the narrowest point below any significant branching. When taking a girth measurement at a non-standard height the height of that measurement above the base of the tree should be noted. Epicormic sprouts, suckers, and dead branches can be ignored. Some guidelines have suggested that