Everything divides for sown produce, but nothing divides for trees except for a wall. If the branches intertwine, it does not divide, rather he gives [one] peah for all [the trees].

A water channel [both sides of] which cannot be harvested at once, R' Yehudah says: It divides. All the hills that are dug with a hoe, even though the ox cannot pass with its implements —- he gives a [single] peah for the whole.