Scarifier for deep strip-tillage

A scarifier having a front and a rear, wherein the scarifier is a deep strip tillage scarifier, comprising:

• a plurality of tillage units, spaced apart and located parallel to each other, where each tillage unit has only four tines, said four tines being connected to the scarifier via a support structure,
• and wherein said four tines consist of only a front tine, only a rear tine and only two intermediate tines,
• and wherein the two intermediate tines located between the front tine and the rear tine, have a lower end protruding deeper below the ground than a lower end of the front tine, and the rear tine has a lower end protruding deeper below the ground than the lower ends of the intermediate tines, and wherein the lower ends of the two intermediate tines are located at a same level relative to the ground,
• wherein the front tine and the rear tine are aligned in a centered position, whereby said front tine cuts a groove in a soil surface and is followed by the rear tine cutting in a same groove, and the two intermediate tines are located opposite to each other in a transversally off-centered position, whereby each of said two intermediate tines is arranged alone and cuts a respective groove, said two intermediate tines not being preceded or followed by any other tine when cutting the respective grooves.