Bava Metzia 103B

בזמורות ובקנים, ושניהם מספקין את הקנים.

the branches pruned from the vines and the poles. And the two of them, i.e., the landowner and the one cultivating the field, both supply the poles.

גמ׳ תנא: מקום שנהגו לקצור ⁠– אינו רשאי לעקור, לעקור ⁠– אינו רשאי לקצור, ושניהם מעכבין זה על זה.

Talmud: It was taught in a baraita: In a location where those cultivating the land were accustomed to cut the produce, the one cultivating this field is not permitted to uproot it, and in a location where they were accustomed to uproot the produce, he is not permitted to cut it. And the two of them, i.e., the owner and the one cultivating the field, can each prevent the other from deviating from the custom.

לקצור אינו רשאי לעקור, האי אמר: בעינא דתתבן לי ארעאי, והאי אמר: לא מצינא. לעקור אינו רשאי לקצור, האי אמר: בעינא דתינקר ארעאי, והאי אמר: בעינא תיבנא.

The Talmud explains the baraita: In a location where those cultivating the land were accustomed to cut the produce, the one cultivating this field is not permitted to uproot the produce even if he wants to, because this one, i.e., the owner, who wants the produce cut, can say: I want my land to be fertilized with stubble, i.e., the remains of the plants. And if the owner wants him to uproot the produce, that one, i.e., the one cultivating the field, can say: I cannot uproot the produce, since that is too labor intensive. Similarly, if the custom is to uproot the produce, the one cultivating this field is not permitted to cut it even if he wants to, because this one, i.e., the owner, who wants the produce uprooted, can say: I want my land to be cleared of stubble. And if the owner wants him to cut the produce, that one, i.e., the one cultivating the field, can say: I want to uproot what remains so that I can use the stubble.