A farm implement includes a chassis, a wheeled section, a tool section, and a fifth wheel coupling device for receiving and coupling with a complimentary coupling pin on a semi-trailer. A fifth wheel coupling system includes a fifth wheel coupling plate having a slot designed to receive a coupling pin of a semi-trailer, a latching mechanism designed to latch onto the coupling pin of the semi-trailer, and a coupling device interface designed to connect the fifth wheel coupling plate and latching device to a farm implement. A method of connecting a semi-trailer to a farm implement having a fifth wheel coupling device includes aligning and connecting a coupling pin of the semi-trailer with a coupling device of a farm implement. A farm implement includes a coupling device designed to connect with a complimentary coupling device of a trailer having a storage tank with a capacity greater than 1,000 gallons.