Kellogg Co. said on Thursday it has reached an agreement with the union on a new five-year contract for its employees at a few breakfast-cereal plants in the United States, potentially bringing a nearly two-month long strike to an end. The tentative agreement, reached after multiple rounds of talks with the union, includes wage increases and benefits for all employees, and better terms for temporary employees. The latest agreement allows for all temporary employees with four or more years of service to move to permanent positions with better pay and benefits. Union members had previously opposed Kellogg’s two-tier employment system that did not offer temporary workers, who make up 30 percent of its workforce, a pathway to become permanent staff. Employees at Kellogg’s cereal plants including Michigan, Nebraska, Pennsylvania, and Tennessee went on strike on Oct. 5 after their contracts expired, as negotiations over payment and benefits stalled due to …