(Reuters) - Walmart <WMT.N> and its unit Sam's Club said on Monday leafy greens suppliers will be asked to implement real-time, farm-to-store tracking using blockchain technology by next September, as the retailer tackles food-safety incidents.
Walmart is among several other retailers such as Nestle SA <NESN.S> trying to tap blockchain, a shared record of data kept by a network of computers to track food supply chain and improve safety.
