抄録
In this paper we dealt the process of implementation of agricultural development policy in Hokkaido since 1950 by analyzing the historical relationship between Comprehensive Hokkaido Development Plan and the government-operated agricultural land improvement projects, the progress on project system and its budget, and their outcomes. The analysis of ex-post evaluation of project and of the amount of project-achieved stocks demonstrates the production and productivity of agriculture had been raised as a result of investment since 1950th. On the other hand, the issues on complexity of direction and supervision caused by engagement of multiagency became obvious.