of individual households and hence warehoused produce does not have to be moved to a public place or reclaimed at the biur time. Households only have to perform biur on produce they receive before the biur time, not on produce they receive after it. Because the Orthodox rules of Kashrut have strictures requiring certain products, such as wine, to be produced by Jews, the leniency of selling one's land to non-Jews is unavailable for these products, since these strictures would render the wine non-Kosher. Accordingly, wine made from grapes grown in the land of Israel during the Shmita year is subject to the full strictures of Shmita. New vines cannot be planted. Although grapes from existing vines can be harvested, they and their products cannot be sold. While obligatory to the Orthodox as a matter of religious observance, observance of the rules of Shmita is voluntary so far as the civil government is concerned in the contemporary State of Israel. Civil courts do not enforce the rules. A debt would be transferred to a religious court for a document of prosbul only if both parties voluntarily agreed to do so. Many non-religious Israeli Jews do not observe these rules, although some non-religious farmers participate in the symbolic sale of land to non-Jews to permit their produce to be considered kosher and sellable to Orthodox Jews who permit the leniency. Despite this, during Shmita, crop yields in Israel fall short of requirements so importation is employed from abroad. Talmudic references Tractate Shevi'it, the fifth tractate of Seder Zeraim ("Order of Seeds") of the Mishnah, deals with the laws of leaving the fields of the Land of Israel to lie fallow every seventh year; the laws concerning which produce may, or may not be eaten during the Sabbatical year; and with the cancellation of debts and the rabbinical ordinance established to allow a creditor to reclaim a debt after the Sabbatical year. The tractate comprises ten chapters in the Mishna and eight in the Tosefta and has thirty-one folio pages of Gemara in the Jerusalem Talmud. Like most tractates in the order of Zeraim, there is no Babylonian Talmud for this tractate. According to the Talmud, observance of the Sabbatical year is of high accord, and one who does not do so may not be allowed to be a witness in an Orthodox beth din (rabbinical court). Nonetheless, Rabbinic Judaism has developed