Heavy duty cultivators cultivate soil to 250 mm depth.They don't treat soil like a plough,they don't mix soil upside down and they cultivate soil by ripping.İn conclusion heavy duty cultivators keep moisture and prove homogenized soil structure by vibration effect.They don't cause compaction deeper layers of soil.Optional rotating harrow harrow break in to pieces clods,reduces soil's surface area,helps to keep moisture and prevevt vanishing of soil.