Cultivation system for crops such as lettuce in floating carriers on water, comprising: - a basin comprising at least one elongate production pond with an infeed end on a short side and an opposite outfeed end , with a long side extending between the infeed end and the outfeed end and with water in the basin; and - a number of elongate floating carriers which move, while in an orientation transversely of a longitudinal direction of the elongate production pond, in a direction through the production pond from the infeed end to the outfeed end along the long side at a rate corresponding to bringing the crops to full growth, which floating carriers each comprise a number of growth locations for the crops where holders for the crops or roots of the crops extend into the water; characterised in that it further comprises - a transport system comprising: * a lifting mechanism at the outfeed end and a lowering mechanism at the infeed end; * a conveyor along the infeed end; at least one conveyor along the long side of the elongate production pond; and a conveyor along the outfeed end; and * at least one pivot mechanism configured to transport floating carriers to the conveyor along the infeed end from the at least one conveyor along the long side of the elongate production pond and/or from the conveyor along the outfeed end to the at least one conveyor along the long side of the elongate production pond. - a basin comprising at least one elongate production pond with an infeed end on a short side and an opposite outfeed end , with a long side extending between the infeed end and the outfeed end and with water in the basin; and - a number of elongate floating carriers which move, while in an orientation transversely of a longitudinal direction of the elongate production pond, in a direction through the production pond from the infeed end to the outfeed end along the long side at a rate corresponding to bringing the crops to full growth, which floating carriers each comprise a number of growth locations for the crops where holders for the crops or roots of the crops extend into the water; characterised in that it further comprises - a transport system comprising: * a lifting mechanism at the outfeed end and a lowering mechanism at the infeed end; * a conveyor along the infeed end; at least one conveyor along the long side of the elongate production pond; and a conveyor along the outfeed end; and * at least one pivot mechanism configured to transport floating carriers to the conveyor along the infeed end from the at least one conveyor along the long side of the elongate production pond and/or from the conveyor along the outfeed end to the at least one conveyor along the long side of the elongate production pond. * a lifting mechanism at the outfeed end and a lowering mechanism at the infeed end; * a conveyor along the infeed end; at least one conveyor along the long side of the elongate production pond; and a conveyor along the outfeed end; and * at least one pivot mechanism configured to transport floating carriers to the conveyor along the infeed end from the at least one conveyor along the long side of the elongate production pond and/or from the conveyor along the outfeed end to the at least one conveyor along the long side of the elongate production pond. <EOS>