Dr Chakravorty has made pioneering contributions in the development of indigenous process know-how and products, leading to import substitution and building up of indigenous capacity and expertise for planning, design and engineering of large-scale fertilizer and heavy chemical plants. Particularly notable among these is the development of know-how for the entire range of fertilizer catalysts and their manufacture in the country. These catalysts have been developed on the basis of a new theory on the mechanism of catalysis propounded by him, and the integration of this know-how in the design and engineering of fertilizer plants. This breakthrough has led to the establishment of the fertilizer industry on a technologically self-reliant basis and has, in its wake, given an impetus to increased indigenous fabrication of machinery and equipment for fertilizer plants. Dr Chakravorty has been responsible for building up the Planning & Development Division of the Fertilizer Corporation of India into a comprehensive and integrated multi-functional organization. It encompasses the various interrelated and interlinked functions of not only laboratory research, pilot plants, project planning, design engineering, procurement, installation and commissioning of fertilizer plants but also agronomical research, application and promotional activities for finished fertilizers in the country; this has rendered possible self-sufficiency in the fertilizer industry in its entirety.