Kilayim 2:3-4

Kilayim 2:3

If a person’s field was planted with wheat and he decided to plant barley, he must wait until the wheat germinates, then he may turn over the soil (in order to uproot the wheat) and then sow the barley. If the wheat already sprouted, he may not plant the barley then turn over the soil; he must turn over the soil first. To turn the soil, he must plow as much as one would plow after the rain. Abba Shaul says he must plow enough that he doesn’t leave a beis seah unplowed. (A beis seah is a piece of land of 2,500 square cubits, which is fit to sow a seah of seed.)

Kilayim 2:4

If his field was already planted with one type of produce and he decided to plant grape vines instead, he may not plant the vines and then turn over the soil. Rather, he must turn over the soil first. If it was planted with grape vines and he decided to plant another type of produce instead, he may not plant the produce and then uproot the vines. Rather, he must uproot the vines first. If he prefers, he can cut the vines to less than a handbreath in height (about three inches), plant the produce, then uproot the vines.