Basically the easy way to check tires if you don't have a pressure gauge on hand. Walk around the truck/trailer and give a firm hit on each tire, and the hammer should bounce back at you! If it sounds like it bottomed out or has a different pitch than the other tires, chances are it's flat! Saves a lot of time instead of sticking the gauge in every valve stem.
All I gotta say is good luck to ya brother! There's a pile of sprayer ruts all over the place that wasn't very fun to bounce across😂. The ground is definitely starting to get better though, did you turbo till it last year fall?