Special tillage machine with a depth of over 40 cm for so-called subsoiling. The working elements of the subsoiler are the teeth finished with chisels. Subsoiler is mainly used for crushing, loosening soil to improve its physical and biological properties. It loosens the soil layer which was not churned by plowing. Thorough penetration and aeration create better conditions for development of plant roots. Specially recommendable in spring and after heavy rainfall in case of standing water.