In a closely watched monthly report, USDA estimated farmers will collect 14.407 bil bu of corn this autumn, down from last month's forecast of 14.475 bil. avg corn yields will reach an all-time high of 173.4 bu/ acre, below last month's estimate of 174.2. USDA didn't give a reason for its adjustments. Analysts expected the government to boost projections for corn output to about 14.5 bil bus on yields of 175 u/r acre, on favorable weather that boosted the crops.