Primary tillage relies on raw tractor horsepower to shatter hardpan and prepare clean seedbeds. Deep rippers, heavy disc harrows, and moldboard plows cut through dense crop residue and aerate packed soil. High-horsepower tractors deliver the continuous tractive force required to drag these heavy steel tools through tough, compacted clay soils. https://globeofblogs.in.net/article/putting-an-old-tractor-to-work-heavy-duty-farm-testing