1. A winged type sub-soiler (Pant Nagar Design) consists of a rectangular frame, a main straight tine with re¬placeable shin and a replaceable foot and two leading tines.
2. Performance test of this sub-soiler has shown maximum soil disturbance, about 3 times more, compared to the conventional curved leg type sub-soiler.
3. The width of coverage is about 1.30 meter and it leaves almost level field in contrast to conventional sub-soilers with a very little increase in draft requirement.
4. It can be pulled with a tractor of 50 hp or more depending upon the depth of operation