Moveable holder for the cultivation of a plurality of plants, comprising: a frame , wherein said frame is provided with a support surface having an area of at least 4 m 2 for supporting thereon the plurality of plants; said support surface having two oppositely facing edges; the frame further comprising a plurality of crossbeams arranged below the support surface and substantially bridging a distance between the two oppositely facing edges; wherein the holder further comprises: two or more support beams , each extending between two adjacent crossbeams (223,224; 225,226) and parallel to said crossbeams; wherein on each of the support beams roller devices (5a,5b; 6a,6b) are provided for allowing rolling movement of the holder across a pair of rails or tubes , characterised in that the holder further comprises a number of load cells (304a, 304b; 404a,404b) for measuring a force exerted on the support beams by the frame; wherein each of the support beams is mounted to its two adjacent crossbeams via one or more of said load cells, and one or more transmitters connected to the load cells and adapted for periodically wirelessly transmitting a message containing data on the force exerted on the support beams by the frame as measured by the load cells, wherein the support surface is completely supported on the support beams via the load cells, so that change in weight carried by the frame can be detected by the load cells. a frame , wherein said frame is provided with a support surface having an area of at least 4 m 2 for supporting thereon the plurality of plants; said support surface having two oppositely facing edges; the frame further comprising a plurality of crossbeams arranged below the support surface and substantially bridging a distance between the two oppositely facing edges; wherein the holder further comprises: two or more support beams , each extending between two adjacent crossbeams (223,224; 225,226) and parallel to said crossbeams; wherein on each of the support beams roller devices (5a,5b; 6a,6b) are provided for allowing rolling movement of the holder across a pair of rails or tubes , characterised in that the holder further comprises a number of load cells (304a, 304b; 404a,404b) for measuring a force exerted on the support beams by the frame; wherein each of the support beams is mounted to its two adjacent crossbeams via one or more of said load cells, and one or more transmitters connected to the load cells and adapted for periodically wirelessly transmitting a message containing data on the force exerted on the support beams by the frame as measured by the load cells, wherein the support surface is completely supported on the support beams via the load cells, so that change in weight carried by the frame can be detected by the load cells. two or more support beams , each extending between two adjacent crossbeams (223,224; 225,226) and parallel to said crossbeams; wherein on each of the support beams roller devices (5a,5b; 6a,6b) are provided for allowing rolling movement of the holder across a pair of rails or tubes , characterised in that the holder further comprises a number of load cells (304a, 304b; 404a,404b) for measuring a force exerted on the support beams by the frame; wherein each of the support beams is mounted to its two adjacent crossbeams via one or more of said load cells, and one or more transmitters connected to the load cells and adapted for periodically wirelessly transmitting a message containing data on the force exerted on the support beams by the frame as measured by the load cells, wherein the support surface is completely supported on the support beams via the load cells, so that change in weight carried by the frame can be detected by the load cells. <EOS>