CHICAGO—Iowa-based farm services provider NEW Cooperative Inc. said on Monday its systems were offline to contain a cybersecurity incident, just as the U.S. farm belt gears up for harvest. The cooperative operates grain storage elevators in the top U.S. corn-producing state, buys crops from farmers, sells fertilizer and other chemicals needed to grow crops, and owns technology platforms for farmers that provide agronomic advice on the way to maximize their harvests. “We have proactively taken our systems offline to contain the threat, and we can confirm it has been successfully contained,” NEW Cooperative Inc. said in a statement. “We also quickly notified law enforcement and are working closely with data security experts to investigate and remediate the situation.” Several grain storage elevators operated by NEW Cooperative contacted by Reuters were open. The timing of the attack is making it crucial that NEW gets their systems back online as soon as …