Cultivator attachments kind of do the same job as a disc harrow as they both till up soil however the main difference is that a cultivator is best used as secondary application after crops are planted. Because of the spacing of the shanks a cultivator can be used over crops to help dig out the roots help loosen up the soil. Check out this newly designed cultivator from EA, that features a 3/8" steel construction with 1/4" reinforcement in stress areas. High quality spring steel c-tines with carbon tips gives superior durability.