Deere and Company is planning a second shutdown of its Waterloo Works due to the lagging farm economy. Plant spokeswoman Mindy Westendorf says it’s a matter of supply and a lack of demand.The weeklong shutdown will include the plant’s large row crop and four-wheel-drive product lines, starting the week of July 16th. The 700 workers who will be laid off for a week next month will also miss a week of work this month. Deere announced in May that it would idle 500-to-700 workers at the Waterloo plant for the week starting June 25th.Last month, Quad City-based Deere says its fiscal second-quarter results fell 37-percent. It posted a worldwide net income of 127-point-eight million dollars for the second quarter. That’s compared to 204-point-three million in the same period last year.