Which tillage and planting approach ensures that at least 30% of the soil surface remains covered with crop residues after planting to help minimize soil erosion caused by water?

Explanation

Conservation tillage is a farming method that retains a minimum of 30% crop residue on the soil surface after planting, which helps reduce soil erosion by water. Deep or intensive tillage typically disturbs the soil more and leaves less residue, so it does not meet this criterion.