Corn fell to a one-week low, set for the biggest annual drop on record, on speculation that rain in Brazil and Argentina will aid crops hampered by hot and dry conditions. Soybeans declined, and wheat reached a 19-month low.
Cattle futures rose the most in six months on concern that U.S. beef supplies will shrink as Tyson Foods Inc. halts purchases of animals fed with a supplement made by Merck & Co. after discovering lame livestock at factories.
Canola tumbled to a three-year low, leading declines across grains and oilseeds, on signs farmers have harvested a record crop in Canada, the world’s biggest grower. Wheat and soybeans capped weekly losses.