A wagon for transport and controlled silting of hygroscopic material, comprised from frame equipped with bogies and with at least two independently controllable wagon boxes, where: - said wagon frame is equipped with one or more hydraulic cylinders with telescopic piston per each set wagon box for controllable lifting of the bottom of the box (2.1); and - each wagon box has on its lateral sides realized one or more controllable lateral segments (2.2) which serve for lateral silting from a cargo space (2.4), and an additional frontal segment (2.3) in case the box is placed at one of the ends of the wagon frame, where the opening of the frontal segment (2.3) results in silting solely over the edge of the wagon frame directly onto the tracks; characterized by that: - said controllable lateral segments (2.2) and the frontal segment (2.3) of the box are opened through displacement of their lower side from the bottom of the box (2.1); - said wagon has controllable connection points formed from fork supports (4.1) set on a frame, and from forks (4.2) set on a lower side of the bottom of the box (2.1); o where through activation/deactivation of the connection point a control is realized over detachable mechanical connection between wagon box and wagon frame in a said connection point, while o the activated connection point enables solid mechanical connection of the wagon box with the wagon frame, allowing for pivoting of the wagon box for a certain angle around such activated connection point; - where activation of hydraulic cylinders with telescopic pistons below the wagon box and the state of controllable connection points of each of the said boxes define the direction and the angle of tilting of each of the wagon boxes individually, with reference to the wagon frame; and - where tarpaulin (7.1) which roofs and preserves the hygroscopic material in the cargo space (2.4) of each box can be independently wound over the cargo space (2.4) or completely rolled onto the tarpaulin winding drum (7.8) placed in the lateral part of the wagon box with the tarpaulin mechanism placed in the frontal part of the box under the lid (7.2). - said wagon frame is equipped with one or more hydraulic cylinders with telescopic piston per each set wagon box for controllable lifting of the bottom of the box (2.1); and - each wagon box has on its lateral sides realized one or more controllable lateral segments (2.2) which serve for lateral silting from a cargo space (2.4), and an additional frontal segment (2.3) in case the box is placed at one of the ends of the wagon frame, where the opening of the frontal segment (2.3) results in silting solely over the edge of the wagon frame directly onto the tracks; - said controllable lateral segments (2.2) and the frontal segment (2.3) of the box are opened through displacement of their lower side from the bottom of the box (2.1); - said wagon has controllable connection points formed from fork supports (4.1) set on a frame, and from forks (4.2) set on a lower side of the bottom of the box (2.1); o where through activation/deactivation of the connection point a control is realized over detachable mechanical connection between wagon box and wagon frame in a said connection point, while o the activated connection point enables solid mechanical connection of the wagon box with the wagon frame, allowing for pivoting of the wagon box for a certain angle around such activated connection point; o where through activation/deactivation of the connection point a control is realized over detachable mechanical connection between wagon box and wagon frame in a said connection point, while o the activated connection point enables solid mechanical connection of the wagon box with the wagon frame, allowing for pivoting of the wagon box for a certain angle around such activated connection point; - where activation of hydraulic cylinders with telescopic pistons below the wagon box and the state of controllable connection points of each of the said boxes define the direction and the angle of tilting of each of the wagon boxes individually, with reference to the wagon frame; and - where tarpaulin (7.1) which roofs and preserves the hygroscopic material in the cargo space (2.4) of each box can be independently wound over the cargo space (2.4) or completely rolled onto the tarpaulin winding drum (7.8) placed in the lateral part of the wagon box with the tarpaulin mechanism placed in the frontal part of the box under the lid (7.2).