Manure from an animal feeding operation in Winneshiek County is to blame for miles of dead fish discovered Tuesday.

By shining near-infrared light energy on dried manure samples and applying calibrated equations, GAN Lab scientists can identify key nutritional markers such as protein and total digestible nutrients.

The Iowa Department of Natural Resources is investigating a fish kill in Winneshiek County’s Dry Run Creek, southwest of Decorah, than spanned six miles.

South Texas cattle producer Bob McCan has discovered more about his rangeland and pasture conditions from analyzing manure ...