The quarter was strong, but the outlook is uncertain.Agriculture equipment manufacturer Deere (DE -3.25%) reported better-than-expected quarterly results but trimmed its full-year forecast for the second time. Investors are focused on what is to come, sending Deere shares down 3% as of 11 a.m. Eastern.Strong quarter, uncertain outlookDeere earned $8.53 per share in its fiscal second quarter ending April 28 on revenue of $15.24 billion, easily surpassing Wall Street's $7.86 per share on sales of $13.3 billio ...