Source: Kim S. Nash, WALL STREET JOURNAL, 9/24/18


Walmart Inc., in a letter to be issued Monday to suppliers, will require its direct suppliers of lettuce, spinach and other greens to join its food-tracking blockchain by Jan. 31. The retailer also will mandate that farmers, logistics firms and business partners of these suppliers join the blockchain by Sept. 30, 2019. The supplier push comes after 18 months of testing the blockchain system from developed by International Business Machines Corp.

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