As a consequence, labour and energy are saved (ROLOT & SEUTIN, 1999).
The average yield of 590 minitubers per [m.sup.2] that was found in this experiment was similar of those reported in the literature for gravel NFT (ROLOT & SEUTIN, 1999; MEDEIROS et al., 2002) and aeroponic systems (FARRAN & MINGO-CASTEL, 2006).