2. Heavier roller? Normally grind the field surface only. No need to go deep into the soil. Because the soil below is already dense. The problem occurs on the surface of the field (earthworms are the culprit). The compactor that can be operated in our school is this size (5 tons) 6,500. If it is larger than this (10 tons) 8,500, it cannot be operated our school. Too big.