(Mishnah): If a sheaf of two Se'ah was forgotten, it is not Shichechah; if two sheaves, that together are two Se'ah, were forgotten - Rabban Gamliel says that they belong to the owner; Chachamim say that they belong to the poor.

(Rabban Gamliel): Is the right of the owner strengthened or weakened with a greater number of sheaves?

(Chachamim): It is strengthened.

(Rabban Gamliel): If when there is one sheaf of two Se'ah, it is not Shichechah; then two sheaves that are together two Se'ah should certainly not be Shichechah.

(Chachamim): Just because you disagree about one sheaf that is (large enough to be considered) a stack; would you disagree about two sheaves that are like small bundles?

If standing corn that was two Se'ah was forgotten, it is not Shichechah. If it was not two Se'ah but it could yield two Se'ah (if left longer to grow), even if its stalks are thin, we view it as if it is a yield of barley.

(Gemara) (R. Elazar): The pasuk states (Devarim 24:19), "When you shall reap your harvest in the field and you shall forget a sheaf in the field" - a sheaf that you are able to reach out and take with your hand. (This excludes a sheaf of two Se'ah, since it cannot be taken in this way.)

Some say - 'and you shall forget a sheaf' - but not a stack (which is an appropriate description of a two Se'ah sheaf).

Where is there a difference between these two understandings? If he forgot a sheaf next to a two Se'ah sheaf - for R. Elazar's reason, it is certainly Shichechah; for the second reason (that a large sheaf is actually a stack), it is a dispute between Beis Shammai and Beis Hillel (earlier in Mishnah 2 - Zevachim 57(a)).

Difference #2: If he forgot two one Se'ah-sized sheaves next to the two Se'ah sheaf - if it is viewed as a sheaf, it is a dispute between Beis Shammai and Beis Hillel (as above). If it is a stack, it does not create a row, so they are all Shichechah.

(R. Yona): The pasuk states (Devarim 24:19), "When you shall reap your harvest in the field and you shall forget a sheaf in the field" - if a sheaf or standing crops are two Se'ah, they cannot become Shichechah.

(R. Yosi): (When the Mishnah said that if it could yield two Se'ah, it is not Shichechah) - this applies when the stalks are thin but healthy, but if they are thin and scrawny, they are viewed as fully grown.