OVERLAND PARK, Kan.–(BUSINESS WIRE)–Compass Minerals (NYSE: CMP) reported a second-quarter loss of $6.4 million, or $0.19 per diluted share, compared to earnings of $6.3 million, or $0.18 per diluted share, in the second quarter of 2016. “Despite a strong performance this quarter in our Plant Nutrition North America business, our results were pressured by increased costs in the Salt segment and sluggish plant nutrition sales in South America,” said Fran Malecha, Compass Minerals’ president an