Mr. Haney recites a line he says is from the fade-out of a Gene Autry picture. Pat Buttram, who plays Mr. Haney, was Gene Autry's comic sidekick in his cowboy movies.
Mr. Haney's bull is named Ole Sanchez.
The running joke with the name Lisa calls Oliver is a shout out to Darryl F. Zanuck who founded 20th Century Films studio, soon to be 20th Century Fox, in the early '30s and continued to hold sway until the mid '50s. In 1968, when this episode of Green Acres (1965) originally aired, he was again top dog, but, alas, not for long, being forced to relinquish his hold on power in 1970.