香川県農業の地域環境特性とその成長規定要因 : 地域産業連関構造とその推移を中心として

Abstract

The purpose of this article is to clarify the regional environmental characteristics and the limiting factors for agricultural growth in Kagawa prefecture. As analitical tools for this objectives, principal component analysis is adopted for the investigation of regional environmental characteristics. As for the limiting factors, shift share analysis is adopted and also regional Input-Output table of which agricultural sector is disaggregated in detail and nonagricultural sectors are heavily aggregated is adopted for structural analysis. Some of findings are as follows. According to the results of shift share analysis, agricultural growth rate affected by the sum of national growth factor, products growth factor and regional growth factor. Agricultural growth rate in Kagawa prefecture is greater than the national average for root crop and horticultural products for the period 1985 to 1993. In the case of root crops, the positive effects by the products growth factors and regional growth factors dominated the negative effects by the national growth factors so that gross output for these products increased. In the case of vegetables and flowers, positive effects by products growth factor dominated the negative effects by national growth factor and regional growth factor. On the other hand, outputs of all other farm products had decreased during this period. Especially, wheat and silkworm industry had decreased their output due to the negative effects by all these 3 factors. Regional growth factors were positive only for root crops and commodities group such as rice, coarse grain, beans, pork and poultry while their products growth factors had caused negative effects. According to the results from regional Input-Output analysis, value added coefficients (ratio) are relatively small for the most of agricultural sectors and also value added induction coefficients by the increased final demand items (especially by public investment) are very low for agricultural sectors. So, 3 big projects such as construction of the Seto Great Bridge, New Takamatsu airport and Highway running through Shikoku island had not always caused big effects on agricultural sectors although they had great effects for the non-agricultural sectors.