U S Fertilizer Technology Patents

This bulletin is a collection of abstracts of U.S. patents selected from those published in the first 11 volumes of Fertilizer Abstracts. It contains 1014 abstracts selected as the most pertinent U.S. patents for the fertilizer industry today. U.S. equivalents of previously issued foreign patents are included. Defensive publications issued by the U.S. patent office have not been included.

February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index

This bulletin is a collection of abstracts of patents granted to TVA on fertilizer technology and related topics over about 45 years. It contains 200 patent abstracts that have been divided into 13 major sections. Each section reflects the improved technology through this period of time. Abstracts of some of the patents issued to TVA since 1968 have already appeared in Fertilizer Abstracts, a journal published monthly since 1968. Inventor and subject indexes are provided in this bulletin.

Fertilizer technology in a changing world; Nitrogen production facilities in relation to present and future demand; conversion of ammonia tofertilizer materials; Chemical and physical properties of nitrogen materials and their sphere of usefulness; Phosphate resources and processing facilities; Chemistry and manufacture of superphosphates and phosphoric acid; Chemistry and technology of new phosphate materials; Patash resources in the united states in relation to world supplies; Production and processing of potassium materials; Resources and processing of materials carrying calcium, magnesium, and sulfur; Mechanics of mixed-fertilizer production; Physical and chemical problems in mixed-fertilizer production.

The research published here constitutes a profound reflection on what is taking place in the world of agriculture at the threshold of the year 2000. The book attempts to go beyond a narrow sectoral analysis of the primary sector. It sets out to focus instead on the dynamic and innovative aspects of the agrotechnological system constituted by the complex interdependence of the agro-production, agro-food, agro-industrial and agro-ecological subsystems. The authors, internationally renowned scholars and scientists, tackle the most pressing contemporary economics issues from both a theoretical and policy-making standpoint. Three different lines of research are pursued concerning, first, the evolution and trends of world and European agricultural production, second, agricultural surplus formation and productivity dynamics in the economies of industrialized countries, and, lastly, the destination of agricultural outputs and land allotment under the impact of agro-bio-technologies.

The Fertilizer Manual, 3rd Edition, is a new, fully updated, comprehensive reference on the technology of fertilizer production. The manual contains engineering flow diagrams and process requirements for all major fertilizer processes including ammonia, urea, phosphates, potassium products and many others. Environmental considerations are addressed clearly. Equally important, the manual includes chapters on fertilizer use, production and distribution economics, raw materials, and the status of the fertilizer industry with demand-supply projections. Professionals involved with any phase of fertilizer production, use, marketing, or distribution will find this book valuable.