The production of scientists by'U.S.' universities has become a major industry during the second half of Che 20th century.- Furthermore- it'has become clear that well trained and motivated' scientists are the source of most new ideas leading to advances in science.and technology that are the driving force 'behind modern economic -growth (Kuznets). The land—grant . universities are'the primary but not exclusive source of trained scientists for U.S. agriculture.' The production of-agricultural scientists in. these universities is centered in departments -affiliated with the agricultural • experiment stations; Furthermore, the training of scientists is one among several important intermediate products of these^agricultural research programs.