ROTOR is a long-term planning tool at field level of organic crop rotations for farmers and advisors. The tool assists in the rotation planning for food and fodder provision, and considers furthermore weed management, phytosanitary restrictions in the rotation, helping to maximise N-fixation by legumes and to avoid N-losses by leaching. The newest version includes new crops such as soybean and new management options. ROTOR operates with two interfaces for data entry form and report of results. Basic and advanced data entry is possible. For a basic query site characteristics, the selection of crop sequences and organic fertilizers is needed. The query can be refined through the modification of advanced settings concerning, yield, manure type, soil condition, legume proportion, cover crops, cultivation breaks, weed control and other. Results can be used to compare between different crop rotation options aiming at ensuring provisioning, N supply, pest, disease and weed control. A tool manual explains briefly how to use the planning tool and how to interpret the results. To go to ROTOR choose „Software for organic agriculture" from the „Software-Downloads“. You will find ROTOR in the drop-down list.