Olivia gives Jody a glass of milk and some cookies. The glass is full throughout the scene. Jody never drinks out of it, but when one of the kids calls him to water the peach tree, the glass is almost empty.
John-Boy says that Ike doesn't know one end of a car from the other, but in The Actress (1973) from the previous season, Ike is adept enough at car repair to remove a broken cylinder.
The peach tree Jim-Bob, Elizabeth and Jody are sitting in (about 2:40 into the episode) is actually an apple tree; it displays the telltale oval-shaped apple tree leaves. Peach tree leaves are oval as well, but markedly longer and more slender. Furthermore, the scene was shot in Oak Glen, a hot spot for apple picking in southern California.