Tillage with an implement having one or more soil-penetrating points that shatter or loosen hard compacted layers to a depth below normal plow depth.
Tillage with an implement having one or more soil-penetrating points that loosen the subsoil and bring clods to the surface. A form of emergency tillage to control soil blowing.
Breaking or loosening the soil, without inversion, with a chisel cultivator or chisel plow. A practice used for cropland, grassland or pasture renovation.