[If] his field was planted with wheat, and he reconsidered [and decided] to plant it with barley — he waits for it until it germinates, he turns [the soil], and afterwards he can plant. If it sprouted, he cannot say: ‘‘I will plant and afterwards turn [the soil]’’; rather, he must turn [it] and afterwards plant. How much must he plow? Like the furrows of the rain. Abba Shaul says: So that there will not remain a quarter[-kav] per beis se’ah.