Mail boxes in the shape of tractors overlook green vegitation near Roca, 

Mail boxes in the shape of tractors overlook green vegitation near Roca, Neb., Wednesday, April 24, 2013. Farmers who have spent the past several months staring at parched fields have a new problem: mud. A rainy spring has brought weeks of rains to the middle of the country, and while it hasn't completely ended the historic drought, new forecasts show it sure has helped.(AP Photo/Nati Harnik)
Associated Press
Mail boxes in the shape of tractors overlook green vegitation near Roca, Neb., Wednesday, April 24, 2013. Farmers who have spent the past several months staring at parched fields have a new problem: mud. A rainy spring has brought weeks of rains to the middle of the country, and while it hasn't completely ended the historic drought, new forecasts show it sure has helped.(AP Photo/Nati Harnik)
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