Abstract
Multiple-intertillage-weeding method for the paddy cultivation described in agricultural books published in Edo-era was tried under present-day cultivating system. Seedlings were grown in the pool-floating system under open air. “Mini-culti” machine with “chain-weeder” was used to intertillage. The number of times of intertillage was 0–16. Almost the same yield to the customary practice was got for more than four times of intertillage. The quality of the rice was ranked as the first grade and “the taste value” was more than 85. These show that the method of agri-cultural books published in Edo-era was true. The essence of this method is the stirring of the surface soil. The stir-ring takes place to uniform the soil physically, to promote the decomposition chemically, to increase the nitrogen fix-ation biologically and to form the stable ecological system ecologically. This method is useful for the cultivation for the resource saving, low input and harmony with the envi-ronment.
