Study Yevamot folio 83B with parallel Hebrew-English text, traditional commentary, and modern study tools. Free access to Babylonian Talmud online.
A person cannot render forbidden an item that is not his. Since the grain does not belong to him, he cannot render it forbidden. According to Shmuel, the halakha is in accordance with R' Yosei in this case as well.
A dilemma was raised before the rabbis: As for a hermaphrodite, what did Shmuel say? It was stated in the name of Rav that the halakha is ruled in accordance with the opinion of R' Yosei with regard to a hermaphrodite, but no ruling was attributed to Shmuel concerning this case. The Talmud suggests
The Talmud asks further: Concerning grafting, what did Shmuel say? The Talmud suggests: Come and hear, as Shmuel said to Rav Anan that he should teach in accordance with the opinion of the one who said that it is prohibited to plant for 33 days before Rosh HaShana of the Sabbatical Year. Evidently,
The Talmud continues to ask along these lines: With regard to the case of protracted labor, what did Rav say? Does he accept R' Yosei’s opinion, as does Shmuel? No resolution was found for this question, and the Talmud concludes that this dilemma shall stand unresolved.
The Talmud further inquires: With regard to proscription, what did Rav say? Rav Yosef said: Come and hear, as Rav Huna said that Rav said that the halakha is not in accordance with the opinion of R' Yosei. Abaye said to him: What did you see that led you to rely on that source? Rely on this source;