Permalink : http://hdl.handle.net/2115/62901

Dairy farmers in Nemuro and Kushiro districts have been rapidly expanding their farm size in recent years, so their working hours of cow raising and roughage production are very long in summer. To make working hours shorter, contractors for roughage production are introduced. By using the contractors, working hours of dairy farmers in summer are shortened, farmers' income increases and costs of roughage production decrease. The maximum charge for farmers is reported to be 50 thousand yen per hector for the capital saving management. For scale expanding farmers, it is 57 thousand yen. The contractors mostly produce high-moisture silage and put silage into a bunker-silo, because they must carry out their premise that they harvest the grasses in a suitable period. On the premise to harvest in a suitable period, the minimum charge for contractors is 59 thousand yen in the selfpropelled harvester system and 67 thousand yen in the pull-type harvester system. It is necessary to establish a system that guarantees them a continuous contract.