While Compass Minerals reported improved second-quarter net income at $13.2 million ($0.39 per diluted share) up from the year-ago loss of $700,000, the company’s Plant Nutrition segment saw a slight drop in operating income to $16.8 million from the year-ago $17.9 million. Plant Nutrition sales volumes were off 13 percent to 85,000 st from the year-ago 98,000 st. The Compass Salt business saw a nice uptick in income to $21.1 million from the year-ago $6.8 million.