A mowing arrangement includes three mowing units with which are associated a drive system including transmissions associated with each unit that are alike to the extent that the mowing units may be easily exchanged with one another. Specifically, one of the mowing units has an angle drive transmission while the transmissions on the other two mowing units are belt or chain drive transmissions. All transmissions are mounted for easy replacement whereby the angle drive transmission may be replaced by a belt or chain drive transmission like the other mowing units if it is desired to use the front mowing unit as a side mowing unit. A drive system variant includes two angle gear boxes used as a power-receiving transmission, with the result that all of the mowing units can be constructed exactly the same.