SIOUX FALLS, S.D. — The U.S. Department of Agriculture predicts another challenging year for farmers in the United States, with farm income declining an additional 8.7 percent in 2017 to $62.3 billion. This would be the fourth consecutive year of declines and represents a 46 percent drop from the record high in 2013. The lower income reflects three years of record crops, and grain prices that are in most cases below break evens. Farmers are feeling a little better about the future with good yields last fall, a pickup in demand and improvements in the general economy.