Walmart plans to use blockchain to track lettuce

Walmart and its unit Sam’s Club said 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 trying to tap blockchain, a shared record of data kept by a network of computers to track food supply chains and improve safety.

Last year, Nestle, Unilever, Tyson Foods and other large food and retail companies joined IBM’s blockchain technology project.

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