[If] an aris protrudes from an embankment — R’ Eliezer ben Yaakov says: If while standing on the ground one can pick it completely, it prohibits four cubits in the field; if not, it prohibits only across from it. R’ Eliezer says: Even if someone plants one on the ground and one on the embankment, if it is higher than the ground by ten handbreadths, it is not combined with it; but if not, then it combines with it.

[If] someone trains a grapevine along part of a lattice, he may not bring foreign seed under the rest. If he brought, it is not condemned. But if the new growth extended out, it becomes forbidden. Similarly, if someone trains [a vine] on part of a barren tree.

[If] someone trains a grapevine onto part of a fruit-bearing tree, it is permitted to bring seed under the remainder. And if the new growth extended out, he must return it. It happened that R’ Yehoshua went to R’ Yishmael in Kfar Aziz, and he showed him a grapevine trained onto part of a fig tree. He said to him: May I bring seed under the remainder? He said to him: It is permitted. And he took him from there up to the house of Hamganyeh and showed him a grapevine trained on part of a beam and the stump of a sycamore with many beams. He said to him: Under this beam it is forbidden, but [under the] rest it is permitted.

Which [tree] is a barren tree? Any [tree] that does not produce fruit. Rabbi Meir says: All are barren trees, except for the olive and the fig. Rabbi Yose says: Any tree the likes of which is not planted in whole fields — this is a barren tree.