According to an ag economist, the United Nations assisted in completing a deal over the weekend that extends the Black Sea Grain Initiative. However, uncertainty still exists around the details of the agreement.

Jim McCormick with AgMarket.Net says the details are “clear as mud.” According to McCormick, Ukraine says the agreement extension is for 120 days, even though Russians say it’s only for 60 days. Ukraine will continue to ship grain to the Black Sea Region, but Russians are raising concerns over the deal, citing complaints regarding access to their markets, banks and U.S. and European sanctions.

Commodity markets reacted Monday with pressure on wheat and corn.

Read more on ongoing Black Sea grain negotiations here.