The farm crisis is about to enter a new phase as Minnesota farmers begin their corn and soybean harvests....the states largest cash crops. The price of those grains is so low most farmers plan to store the crop until prices improve. Farmers and grain elevators are scrambling to find enough space to hold the crop. Mainstreet Radio's Mark Steil reports: traffic sounds up Along highway 14 in Walnut Grove is an example of how one farmer beat the grain storage problem. On a corner is a turn of the century grain elevator. Along with some steel bins added later, the complex once was