Bava Batra 25A

שעושה אותו גלל.

he turns it into manure, i.e., the chaff acts like manure, and an excessive amount of manure damages the seeds.

מתני׳ מרחיקין את הנבלות ואת הקברות ואת הבורסקי מן העיר ⁠– חמשים אמה. אין עושין בורסקי אלא למזרח העיר. רבי עקיבא אומר: לכל רוח הוא עושה, חוץ ממערבה; ומרחיק חמשים אמה. ומרחיקין את המשרה מן הירק, ואת הכרישין מן הבצלים, ואת החרדל מן הדבורים. ורבי יוסי מתיר בחרדל.

Mishnah: One must distance animal carcasses, and graves, and a tannery [haburseki], a place where hides are processed, 50 cubits from the city. One may establish a tannery only on the east side of the city, because winds usually blow from the west and the foul smells would therefore be blown away from the residential area. R' Akiva says: One may establish a tannery on any side of a city except for the west, as the winds blowing from that direction will bring the odors into the city, and one must distance it 50 cubits from the city. One must distance from vegetables water in which flax is steeped, because this water ruins them; and likewise one must distance leeks from onions, and mustard from bees. And R' Yosei permits one not to do so in the case of mustard.

גמ׳ איבעיא להו: רבי עקיבא היכי קאמר? לכל רוח הוא עושה וסומך, חוץ ממערבה ⁠– דמרחיק חמשים אמה ועושה; או דלמא: לכל רוח הוא עושה ומרחיק חמשים אמה, חוץ ממערבה ⁠– דאינו עושה כלל?

Talmud: A dilemma was raised before the rabbis: With regard to what case is R' Akiva speaking? Did he mean that one may establish a tannery on any side of a city, and one may even place the tannery close to the city, except for the west side, where one must establish it at a distance of 50 cubits? Or perhaps he meant that one may establish a tannery on any side and distance it 50 cubits, except for the west side, where one may not establish a tannery at all.