In 2151, after repeatedly warning Klaang in English to drop his weapon, Moore shot and seriously wounded the Klingon courier, with a plasma rifle, after Klaang crashed his vessel on Moore's land while attempting to evade two Suliban soldiers. Moore later claimed self-defense as his reason for firing. (ENT: "Broken Bow")
Farmer Moore was played by Ron King.
Moore was named after writer Ronald D. Moore, who had written many Klingon episodes during his time with Star Trek. ("Broken Bow" text commentary, ENT Season 1 DVD; Star Trek Encyclopedia (4th ed., vol. 2, p. 52))
The character is not named in the script of "Broken Bow", which simply refers to him as a farmer. The same script also characterizes him as "middle-aged". Although the episode does not establish whether Moore had viewed any other aliens prior to his encounter with Klaang, the script specifies of Moore, "He's never seen an alien before." 
Star Trek: Federation - The First 150 Years gives him the first name Richard.