The implement in question is a Lely Roterra. It's used to work the soil and produce an adequate seed bed in severe conditions when there are clumps and clods of dirt that need to be broken apart to enhance seed to soil contact to provide for germination of crop seeds.
They can be used very effectively on smaller tracks. They require a lot of PTO horsepower and are generally a high maintenance machine. This is probably why they are not readily used on the bigger tracks. Tony Stewart uses two of them at The Chili Bowl. Quite effectively, I might add. A 100 horsepower tractor would only accommodate about a 12' Roterra used for race track prep. A Roterra is not generally used in solid packed soils such as what is present at a dirt race track. That only adds to the high maintenance situation. Solid soils are very hard on them.
They can be used very effectively on smaller tracks. They require a lot of PTO horsepower and are generally a high maintenance machine. This is probably why they are not readily used on the bigger tracks. Tony Stewart uses two of them at The Chili Bowl. Quite effectively, I might add. A 100 horsepower tractor would only accommodate about a 12' Roterra used for race track prep. A Roterra is not generally used in solid packed soils such as what is present at a dirt race track. That only adds to the high maintenance situation. Solid soils are very hard on them.
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