Rav Pappa said to Abaye: What is different about the earlier generations, for whom miracles occurred, and what is different about us, for whom miracles do not occur? If it is because of Torah study, in the years of Rav Yehuda, all of their learning was confined to the order of Nezikin, while we learn all six orders! Moreover, when Rav Yehuda would reach in tractate Uktzin [which discusses the extent to which the stems of various fruits and vegetables are considered an integral part of the produce in terms of becoming ritually impure, the halakha that a woman who pickles vegetables in a pot (and some say when he would reach the halakha that olives pickled with their leaves are pure, because after pickling, it is no longer possible to lift it by its leaves, so they are no longer considered part of the fruit), he would find it difficult to understand.] He would say: We see the disputes between Rav and Shmuel here. Yet we, in contrast, learn thirteen versions of Uktzin.