An introduction to the mishnayot and yerushalmi on masechet sheviit.
Rav Bar Hayim uses the perush of R Yehuda Felix ztz"l and helps explain some of the realities of farming.
Can one beit din uproot the words of an earlier beit din? (See mishna eduyot 1:5, Rambam hilchot mamrim perek 2). What is a minhag?