Among the food-grains, rice is the principal crop in the state of Assam. The agro-climatic situation prevailing across the zones favours rice cultivation in the state. Hence, the state being one of the main rice growing states of India can contribute a lot to the national economy. The area, production and productivity of crops fluctuate with time. Change in productivity is basically technological and hence, more promising. Therefore, a quantitative assessment of growth and instability as well as adoption pattern of technologies assumes significance in the context of agricultural development...