cultivator
noun /ˈkʌltɪveɪtə(r)/
  /ˈkʌltɪveɪtər/
 - a person who cultivates (= grows crops on) the landTopics Farmingc2
 - a machine for breaking up soil and destroying weeds (= plants growing where they are not wanted)
 
Word Originmid 17th cent.: probably influenced by French cultivateur.