There are] three lands in regard to [the law of] biur: Judea, and the other side of the Jordan, and the Galilee; and each one consists of three areas. Upper Galilee, and Lower Galilee, and the valley; from Kefer Chananyah and higher, wherever sycamores do not grow [is] Upper Galilee; and from Kefar Chananyah and lower, wherever sycamores grow [is] Lower Galilee; and the region of Tiberias [is] the valley. In Judea: the mountain, the lowlands, and the valley. The lowlands of Lod are like the lowlands of the South and its mountainous [region] is like the King’s Mountain. From Beis Choron to the Sea [is] one province.

Why then did they say [that there are] three lands! So that they may eat [seventh-year produce] in each of them until it disappears from the last of its [regions]. R’ Shimon says: They spoke of three lands only in regard to Judea, but all the rest of the lands are [treated] as the King’s Mountain. All of the lands are alike in regard to olives and dates.

One may eat based upon [availability in] abandoned [areas], but not upon [availability in] protected [areas]. R’ Yose permits [consumption] based even upon [the availability in] protected areas. One may eat based upon [the availability in] birdhouses, and upon the second crop, but not based upon [the availability of] the winter crop. R’ Yehudah permits as long as they have begun ripening before the end of the summer.

[If] one preserves three [kinds of vegetables] in one barrel — R’ Eliezer says: One may eat based upon [the availability of] the first. R’ Yehoshua says: Based even upon the last. Rabban Gamliel says: Any vegetable whose species has disappeared from the field must be removed from the barrel; and the halachah follows his view. R’ Shimon says: All vegetables are alike regarding [the law of] biur. One may eat purslane until artichokes disappear from the valley of Beis Netophah.