Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
agrĭcultĭo, ōnis, f., better separately, agri cultĭo, husbandry (only twice in Cic.): si agri cultionem sustuleris, Verr. 2, 3, 97: qui se agri cultione oblectabant, id. Sen. 16.