The old poor truck in FS25 might not have specific trailers for bales or grains, but you can still transport them using other methods.
For bales, you can use a bale spike or bale trailer attachment for loading and unloading bales onto the truck. The bales can be stacked on the flatbed or secured using straps to prevent them from falling during transport.
When it comes to transporting grains, you can use a grain trailer or a tipper trailer to load the grains onto the truck. Make sure to secure the load properly to prevent spillage and damage during transportation.
Even though the old poor truck may not have specialized trailers for bales and grains, with the right attachments and careful handling, you can still effectively transport these items in FS25.