The Methys PCS : Innovation lies in the redesign of a machine to optimise its operation, energy consumption and environmental impact. Passive scalps have been around for decades. They were used before the arrival of synthetic total weed killers. Today, the energy and climatic contexts have changed. The total redesign of a scalper led us to meet the following objectives : Reduce fuel consumption Be able to scalp at 3cm across the whole width to keep freshness and limit CO2 emissions Keep crop residues on the surface => have a lot of clearance to avoid blockages with a tine tool To be able to work in the presence of large plant cover Very low energy consumption and uncompromising scalping quality Low working depth control 7 ground contact points, perfect ground tracking 12 depth control wheels 3 dimensional" control by isostatically supported frame/extensions and 3D deformable structure Real trailed machine to avoid the tractor’s movements when moving forward Low fuel consumption (3l/ha in second pass and 6.5l/ha in first pass) A machine adapted to conservation agriculture Large clearance to eliminate blockages : destruction of plant cover, management of large volumes of crop residues) Penetration power to be able to do the first pass in stubble ploughing (even with a large quantity of straw) Limiting soil disturbance by being able to work precisely at a shallow depth of 2 to 11 cm Unprecedented horizontal and vertical clearance for perfect ground tracking