Here is the latest Iowa news from The Associated Press at 3:15 a.m. CST

OMAHA, Neb. (AP) — Anyone who handles anhydrous ammonia fertilizer is encouraged to attend safety training because it can be dangerous if it is mishandled. One of the next training opportunities will be on Nov. 29 at the Mid-America Center in Council Bluffs, Iowa.

HAMBURG, Iowa (AP) — Sheriff’s deputies in the southwestern corner of Iowa have seized about 300 pounds of marijuana in a traffic stop along Interstate 29. The Council Bluffs Daily Nonpareil reports that the marijuana was found after a recreational vehicle was pulled over near Hamburg. Deputies say a police dog indicated the presence of drugs in the vehicle, leading to a search of it.

DES MOINES, Iowa (AP) — Agribusiness experts say high production costs and low commodity prices are forcing more and more dairy farmers out of business in Iowa and other dairy states. Experts say the global flood of milk has depressed prices to about half what they were in 2014, and they still haven’t hit all-time lows. University of Wisconsin-Madison dairy policy analyst Mark Stephenson says the U.S. needs a significant increase in exports to bring about a dramatic improvement in prices.

GUTHRIE CENTER, Iowa (AP) — Authorities believe the pilot of a small plane that crashed in central Iowa, killing all four people on board, may have suffered a heart attack. The Guthrie County Sheriff’s Office says in a news release that a student pilot was going to attempt an emergency landing Friday night because the pilot apparently had a heart attack, but the plane dropped off radar southwest of Guthrie Center airport.