A leafy vegetable having a core end and a leafy end is processed after being harvested. An image of the object is digitally captured. The machine includes a control device that operates in a field initial-cutting mode in order to specify at least one parameter setting for at least one of the functional devices so that the parameter setting the harvesting machine can be brought into a configuration that is suitable for the initial cutting of the field. Methods of making such electrodes and assay devices or kits with such electrodes, are also provided. Then, the operation of each part is controlled by an apparatus controller to start the cleaning processing of the polished wafers by the polishing platen for the final stage polishing within a predetermined time period from the completion of polishing by the polishing platen for the final stage polishing. in addition to the microwave oven.