Abstract
In Hokkaido, a f our-crop rotation system consisting of wheat, potato, sugar beet, and beans was executed for vegetable production. The number of farm households has decreased, whereas the area of farmland per farmer is rapidly increasing. Under these circumstances, introduction of new technologies for avoiding farm work competition and working time are important for maintaining crop rotation. In the present study, we first presented an outline of the farm work competition in field crop rotation and farm work involved in the production of each major crop, and provided information of the techniques corresponding to the farming problems in crop rotation. In next, we gave the information of spreading novel technologies, e.g., the use of highperformance harvester, automatic steering tractors, and precision farming, and developing support systems. Finally, we discussed the new subjects of farm work and farming awaiting solution in the future in Hokkaido.
