Synopsis This textbook "Soil Chemistry" is the outcome of twenty four years of author’s teaching, research and extension experience in soil science. The book "Soil Chemistry" comprises of eight chapters and an equal emphasis for discussion on various aspects is being given for all chapters. The book has been written and designed as per syllabi of the undergraduate studies of soil science of different Agricultural Universities of India and also of interest who are engaged in the studies of soil science. Each chapter of this book is arranged sequentially and rthythmically so that one can understand the subject matter easily. Chapter 5th and 8th are the new one and deals with Chemistry of Submerged Soil, Soil & Water pollution respectively which would certainly be helpful for the students of agriculture. It is hoped that this textbook will meet the growing need of soil science curriculum of different Indian Agricultural Universities. Any suggestions for improvement will be highly appreciated.