וַיָּ֥זֶד יַעֲקֹ֖ב נָזִ֑יד וַיָּבֹ֥א עֵשָׂ֛ו מִן־הַשָּׂדֶ֖ה וְה֥וּא עָיֵֽף׃
And Jacob sod pottage; and Esau came in from the field, and he was faint.
Mishnah Sheviit
They may manure and hoe cucumbers and gourds until Rosh Hashanah. So too with regard to irrigated fields. They may remove flaws from trees, strip off leaves, cover roots with earth, and fumigate the plants until Rosh Hashanah. Rabbi Shimon says: one may also remove leaves from a grape cluster even in the seventh year itself.