This book provides the knowledge and insight into the fundamental aspects of Electric Discharge Machining (EDM) processes and various hybrid machining technologies derived to improve the machining efficiencies. Fundamental theory of material removal, recent research trends and future research directions have been covered in each chapter. After explaining EDM, Dry and Near-dry EDM processes, Electrochemical Spark Machining, Arc Machining processes, Electric Discharge Hybrid-Turning processes, Electrical Discharge Grinding, Electric Discharge Milling, and various assisted EDM processes have been discussed. Finally, modeling and simulation of hybrid machining processes are also included. The book reflects the recent developments and trends in electric discharge hybrid machining processes. It covers in detail the basics of EDM, various hybrid and assistive technologies in EDM. It includes the updated discussion on the significance of process parameters in various hybrid EDM processes. An overview of modelling and simulation of hybrid EDM process is provided. This book is aimed at Graduate students, researchers in manufacturing engineering, production engineering, and materials engineering.

Rice cultivation has become less profitable in recent years due to increasing production cost and plateauing yield levels. Although direct seeding of rice in the low lands is a cost effective and labour saving method of crop establishment, excessive weed growth, leading to high production costs and low productivity, is a major constraint and it dramatically reduces the nutrient use efficiency. Scarcity and high costs of organic manures also constrain rice productivity. Concurrent growing and incorporation of green manure crops at 30 days after sowing either by cono weeding or by spraying herbicides could provide the organic manure requirement of rice besides reducing weed infestation of the crop field, which is a major problem in direct seeded rice culture. The peak nitrogen release from concurrently grown green manure crops coincides with the critical growth stages of rice, the panicle initiation stage, and thereby ensure availability of N at the critical stages and can reduce the N requirement up to 25% and increase the soil fertility status and the yield of succeeding transplanted rice crop. This technology is a cost effective practical model for sustainable rice production.