Grain and livestock end mixed Tuesday.  John Heinberg, Total Farm Marketing, says corn failed mid-session with conflicting information about guidance being delayed for the 45Z Clean Fuel Production Credits, but it also hit chart resistance.  Soybeans ended higher with short covering after bouncing off support and with help from higher product values and talk of China buying soybeans.  Wheat saw a slight bounce off yesterday's new lows iwth the dollar slightly weaker.  Cattle futures bounced with higher Choice boxed beef at noon and speculation cash could be higher again but can the market get through resistance on the charts, especially Feb. live cattle at $190 and can feeders continue to rally?  Hogs saw some consolidation and Heinberg says that market is overbought and due for a correction.