U.S. District Judge Gregory Frizzell hears closing arguments today, February 18, in Oklahoma’s lawsuit against poultry producers. The suit alleges that contract farmers caused pollution of the Illinois River watershed by distributing poultry litter as fertilizer.

According to Tulsa World, the judge will probably delay ruling to a future date, after he has had an opportunity to thoroughly consider filings that the two sides made to the courts last week. Oklahoma is asking for limitations on poultry litter fertilizer applications and for the poultry companies to pay civil penalties and the costs incurred by the state in pursuing the case.