Field Test on Eco-ecomomy-balanced Agriculture Model assimilated to Sub-tropical Climate Conditons in Ryukyu Islands for Reduction of Top-sil Erosion and Preservation of Corals

Abstract

 This paper intends to verify the workability of proposed eco-economy-balanced agriculture model to be transfigured from the present mono-culture-style one which has been widely introduced after WWII to promote cash crop production in the islands. Assumedly, such eco-oroiented agriculture model should comply with long-standing traditional intercrop and/or crop rotation cultivation systems assimilated to local subtropical climate with animal excreta compost combined. Herupon, the authors set up test field to conduct the comparative study for two years to clarify the merits expected by those eco-economy-balanced agriculture system . As a result, those merits could be fully verified on the following points: productivity, profit, quality of the product and reduction of environmental impact due to top-soil erosin.