John Deere unveiled more than a dozen new products and updates at a media event a couple of weeks ago in Waterloo, highlighted by its first-ever four-track tractors.

The 9RX Series tractors, which have a beginning list price of $498,000, range from 470 to 620 engine horsepower and feature a large undercarriage and track system engineered to provide power, durability and improved ride quality, said Jerry Griffith,...