By Bret Kenwell Deere is getting mowed after the earnings report. Here’s the must-hold support level for the stock. It hasn’t been a good week for the “old faithful” stocks, like Walmart (WMT) – Get Walmart Inc. Report, Target (TGT) – Get Target Corporation Report and Deere (DE) – Get Deere & Company Report. There’s been carnage in the retail space. Walmart and Target had been hit hard after reporting earnings. Farm- and garden-equipment major Deere isn’t dodging the pain, either, down 13% after it reported earnings before the open. That’s even after Deere beat earnings and revenue expectation…