In this paper, total factor productivity has been computed and sources of growth identified for Pakistan’s agriculture for the period from 1953-54 to 1978-79. Total factor productivity has been computed by doing growth accounting using the linear production function approach. The analysis shows that during the subperiod from 1964-65 to 1969-70, when the agricultural sector grew at a spectacular rate, more than 84 percent of the increase in output could be attributed to technological change and about 16 percent to increased use of inputs.