Procedure to digitize an entire root system. Procedure to vectorize an entire root system. A. Thick and easy to recognize parts of the root system are manually traced on a transparent sheet at the rhizotron surface. B. The entire root system is extracted and cleaned. C. The different parts are dissociated. D. The transparent sheet is laid on the surface of the scanner. E. Each root axis is successively placed on the scanner according to the drawing and scanned. F. As a result, every root system is contained in a set of several images. G. Every root image is traced with SmartRoot. H. The different tracing are regroup into a single vectorized root system using SmartRoot.