The U.S. sorghum crop is the world's largest and this year's output is suffering from overly dry conditions. USDA's crop condition rating is 53 percent good/excellent, 10 points below the five-year average of 63 percent and could signal a smaller harvest.    Sorghum is a useful crop, serving both as an animal feed but also for food purposes. U.S. sorghum producers historically felt like the stepchild to King Corn, with the latter having higher total yield per acre and previously a more generous government subsidy plan. It was favored for growth in more arid places such as the Southern Plains down into Texas due to its lower water requirements. Africa was a major export market where it was used for food and making beer. Glob...