dˈʊɹɹɪŋ hɪz θˈɜːɾi ˈeɪt jˈɪɹz æt stˈeɪt, tɹˈɔɪɚ bɪkˌeɪm ɐ fˈʊl pɹəfˈɛsɚ wɪð ɐ fˈoʊkəs ˌɔn plˈænt fˌɪzɪˈɑːlədʒi ænd ðə hˈɪstɚɹi ʌv bˈɑːtəni, pɚtˈɪkjʊlɚli ɪn nˈɔːɹθ kˌæɹəlˈaɪnə.
During his 38 years at State, Troyer became a full professor with a focus on plant physiology and the history of botany, particularly in North Carolina.