Support (for R. Yosi - R. Yudan - Beraisa - Rebbi): Even when they said [that trees are considered saplings until] five years, six years and seven years (so one may plow a field for them in Erev Shemitah until Rosh Hashanah), five years is for vines, six years is for fig trees, and seven years is for olives. (SEFER NIR - since trees do not develop at the same pace, we must say that a root the size of a needle does not prove how old the tree is. Rather, it is a Shi'ur of being attached.)

Question: And we see these young date trees that bring fruits (before six years)!

Answer (R. Yudan b'Ribi Tarfon): In their thickness [they are not like adult trees until six years].

[Our Mishnah said] if a tree was uprooted u'Vo Breichah (and in it is a branch that he was Mavrich - the text should say) 'u'Vo Brachah' (such a branch is a Brachah, for it produces new fruits);

(R. Chunah citing R. Yochanan): 'U'Vo Breichah' (is the correct text);

(R. Mana): There are people whose name is Breichah, like it says "Bo Baruch Hash-m." (We explained this like RIDVAZ.)

(R. Ze'ira citing R. Yosi citing R. Lazar citing R. Chanina, and R. Ba citing R. Chiyah citing R. Lazar citing R. Chanina citing R. Chanina ben Gamliel): If one was Mesapek (grafted a vine branch, of) a Yaldah (young tree) onto a Zekenah (old tree), the Yaldah became Tahor (exempt from Orlah).

Support (R. Chiya bar Ba - Mishnah): Sipuk of vines - Sipuk on Sipuk, even if he was Mavrich in the ground, it is permitted;

One should be concerned lest the Yaldah took root [in the ground] before it became [properly] connected (so it is like a new vine! We must say that we are not concerned due to R. Chanina's law; Sipuk of a Yaldah onto a Zekenah exempts.)

Rebuttal (R. Chananyah brei d'R. Hillel): [The Mishnah] is like R. Yehudah. R. Yehudah says that [the Yaldah] becomes connected before it takes root. (However, perhaps Sipuk of a Yaldah onto a Zekenah does not exempt.)

(R. Yosi citing R. Yochanan): There is no significance to Ichuy (grafting, to exempt from Orlah).

Question (R. Ze'ira, to R. Yosah): Did you explicitly hear this from R. Yochanan - or, [did you infer it] from his opinion [elsewhere]?

R. Yochanan said, and it was taught so (in a Tosefta), that if one was Makdish [a tree] and afterwards planted it, it is exempt from Orlah. If he planted and afterwards he was Makdish, it is obligated in Orlah;

[Perhaps] you (R. Yosah) hold that Hekdesh exempts, and a Zekenah exempts. (Just like if one planted and afterwards was Hekdesh, it is obligated, also what took root and later grafted, it is obligated.)

These are dissimilar! Hekdesh, it is proper to redeem it and obligate it. A Zekenah - is it proper to have intent for it and obligate it?!