This paper deals with the problem “Subsoiler with fertiliser spreader” driven by a tractor. The paper includes market analysis and existing devices and, in addition to the devices themselves, tractors were also analyzed, as well as the method of connecting the working attachments to the tractor and the parameters of the tractor drive. Based on the analysis, a functional decomposition and morphological matrix were made, according to which concepts were developed and evaluated. The best rated concept was elaborated in more detail, the necessary calculations were performed and a 3D CAD model was constructed. Based on the model, the technical documentation of the basic assemblies and parts of the device was prepared.