Abstract: The present study was undertaken to find the growth rates and trend of production and yield of HYV Boro and Aman rice. Secondary data for the period of 1974-75 to 1999-2000 were used for the study. Production and yield of HYV Boro showed significant positive growth during the study period. HYV Aman production showed significant positive growth and HYV Aman yield showed insignificant negative growth during the same period. The growth rates of yield and production of HYV Boro and HYV Aman rice were also computed for the nineties. The growth rates of nineties were computed to have a comparative measure, between the two sub-periods. During the total period of 10 years in nineties, yield and production growth rates of HYV Boro were positive and significant. The growth rates of yield and production HYV Aman were negative and positive respectively and growth rates were statistically insignificant. The growth rates of production of HYV Boro were positive and insignificant in sub-period-I (early nineties) and positively significant in sub-period-II (late nineties). The production growth rates of HYV Aman were positive both in sub-period-I and sub-period-II. But the growth rates were statistically insignificant. Yield had negative insignificant growth in sub-period-I for HYV Boro yield of HYV Aman showed negative insignificant growth in the two periods. The growth parameters of HYV Boro were significantly different in early nineties and late nineties but in case of HYV Aman growth parameters were not significantly different between the two sub-periods of nineties.