(Mishnah): 'Imahos' of onions are obligated in Peah.

R. Yosi exempts patches of grains planted between the vegetable rows.

(R. Yosi): Peah must be given separately from each patch.

(Chachamim): One Peah is given for all of it.

(Gemara): (What are Imahos?) Rav - 'Purgadah' (large, partially edible onions left in the ground for planting). Shmuel - 'Tzumchasah' (the roots and remnants of onion left in the ground when onions are uprooted). (The Gemara continues to explain the Mishnah according to the opinion of Shmuel.)

(R. Yaakov bar Bun citing R. Chanina): R. Yosi exempts them because they are essentially ownerless (Hefker).

Question (R. Bun bar Chiya to R. Mana): Is ownerless produce obligated in Peah? (Why would the Chachamim obligate them?)

Answer (R. Mana): Since the owner re-acquires each one from Hefker, it is as if he did not make it Hefker. But R. Yosi reasons that since he already made it Hefker, it remains exempt.

Question (Baraisa): The Chachamim responded to R. Yosi - even though one who has a large quantity of onions does not store them away, he would store a small number, including Tzumchasah - so it would be obligated in Peah. This shows that the dispute (between the Chachamim and R. Yosi) is not over making it Hefker; rather, Chachamim focus on the minority of people who do store it away and R. Yosi focuses on the majority who do not.)