Contracting for produce in advance - even when the harvest or processing isn't finished, but the raw goods are already in the offing, and some number of steps are needed to complete the product. But whose process? Human handling or natural (or divine) ripening, etc.? Also, a series of cases to back the respective views of Rav and Shmuel. Plus, a new mishnah on lending seed wheat to one's sharecroppers.