The Relationship between Natural Rairfall and the Rice Yield
By use of the dekad rainfall and isochronal yield data,the relationship between natural rainfall and the rice yield was analysed by the integral regression and multiple regression equations. The results confirm that the increament of early rice yield and late rice yield by the artificial rain enhancement may by averaged to per mu 2. 46kg/mm. ha-1 and 1. 65kg/mm. ha-1,respectively.