At the close of every summer, the trucking industry gears up for harvest season, which traditionally contributes to a further tightening of capacity — for a couple of reasons. Owner-operators who also own farms remove their trucking capacity from the market for over a month to harvest produce and deliver it to market.
Additionally, to ensure the extra capacity needed during harvest season, brokers use a dedicated group of carriers to haul oranges, watermelons, avocados, corn, cotton or...
https://www.freightwaves.com/news/tis-the-season-harvest-haulers-stress-an-already-tight-market