Here is the latest Iowa news from The Associated Press

DES MOINES, Iowa (AP) — Iowa farmers efforts to control the spread of nitrates in recent years appears to be helping but research shows that levels of the fertilizer byproduct have soared in the state’s major rivers. The Des Moines Register reports that nitrate levels have more than tripled since the 1950s to more than 7 milligrams per liter in 2010. Researcher Keith Schilling with the University of Iowa says the upward trend in nitrate levels is unmistakable.

DES MOINES, Iowa (AP) — Hillary Clinton is taking her newly announced presidential campaign into the heart of small town Iowa this week. Clinton will tour a community college in Monticello on Tuesday and visit a produce distribution company in Norwalk on Wednesday. That’s according to a schedule provided by her campaign Sunday.

DES MOINES, Iowa (AP) — Two Iowa State University football players were arrested in separate incidents after Saturday’s spring game. The Des Moines Register reports 20-year-old Jack Rhoads, who is the son of coach Paul Rhoads, was one of the two players arrested. The other player was 23-year-old Terry Ayeni. Neither player was in custody as of Sunday morning.

DAVENPORT, Iowa (AP) — Two Iowa men who were wounded by gunfire are now facing charges because they police say they tried to mislead investigators. The Quad-City Times reports the two men went to the hospital late Friday for treatment of their wounds, which are not life-threatening. The men were both arrested on suspicion of filing false police reports.