The author's period from 68 to 74 years of age is remarkable for the strenuous travels made by him in the Himalayan Regions and other regions from Kailash to Kanyakumari for study of Ecosystems particularly with reference to the regions where the Rigveda originated. The work bears testimony to the hard work put in by him as a researcher in the field towards which he has been irresistibly fascinated. The Book contains a study of several mantras selectively taken from the Rigveda and their relevance under various heads relating to agriculture has been closely examined. The mantras are found occasionally to be of wider scope and specific spiritual value but their relevance to the subject matter at hand is a thing that we appreciate only on going through the work as a whole. The Part of the work devoted to the heading "Management" is noteworthy for the compilation of mantras from the Rigveda calculated to have the various effects on the environment as outlined in it. There are also thought provoking ideas about the origin of the universe and the impact of the environment on the welfare of the human species. This book is a must for those interested in the quasi - scientific speculation upon the fortunes of humanity in retrospective as well as prospective terms.