1999, Rufus L. Chaney, Yin-Ming Li, Sally L. Brown, Faye A. Homer, Minnie Malik, J. Scott Angle, Alan J. M. Baker, Roger D. Reeves, Mel Chin, Chapter 7: Improving Metal Hyperaccumulator Wild Plants to Develop Commercial Phytoextraction Systems: Approaches and Progress, Norman Terry, Gary S. Banuelos (editors), Phytoremediation of Contaminated Soil and Water, page 151, Phytoextraction is fundamentally an agricultural technology. Connecting this agricultural production system to metal recovery technologies will be a challenge for researchers and managers of phytoextraction enterprises.
Source: wiktionary