戴明博士1928-1939期間，在美國農業部的固氮實驗室 (Fixed Nitrogen Research Laboratory)任職。
固氮作用是農業"肥料學"之大學問。在2015年9月24日讀了耶魯大學的研究新聞報導，他們給"固氮作用"科學上的解釋。參考：The world’s nitrogen fixation, explained 固氮作用
http://hcsstt.blogspot.tw/2015/09/the-worlds-nitrogen-fixation-explained.html
農業部給他不少資源，譬如說，1935年到英國留學，以及之後著名統計學家們的短期演講和整理成報告書籍發行。
The Three Careers of W. Edwards Deming | The Deming ...
https://deming.org/content/three-careers-w-edwards-deming
Deming's formal education included an engineering degree from the University of Wyoming, a master's degree in mathematics and physics from the University of Colorado, and a PhD in mathematical physics from Yale University in 1928.
A Natural Progression of Interests
On receiving his PhD, Deming was offered a job at the Western Electric Company, where he had worked summers, but chose instead to enter government service. The first of what would prove to be three careers, which lasted until 1939, was in the Fixed Nitrogen Research Laboratory of the U.S. Department of Agriculture. There, the study of the physical properties of materials led him into statistics via the theories of measurement errors and least squares that he encountered in this work. This was, he asserted, a "natural progression of interests." His path was also influenced by surveying and geodesy, where least squares methods were also used, and the kinetic theory of gases, from which he learned a lot of probability.
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