Iowa farm income fell $3.3 billion during the first quarter compared with a year ago, according to a report from the U.S. Department of Agriculture. The drop continues a trend of decreased farm income due to lower corn and soybean prices, and the industry moderating after a period of rapid revenue growth. The department is predicting that farm income nationally will be down about 27 percent in 2014 from 2013, reports DesMoinesRegister.com.