This book is based on the research which tries to explain the technological gap in adoption of recommended production technology among tribal black gram growers of Chhattisgarh, India. The book comprises five chapter i.e. introduction, review literature, research methodology, results & discussion, summary and conclusion. The book also guides how to conduct research in field of agricultural extension, social science. It explains some constraints in adoption of recommended black gram practices. The book will be useful for researcher, field extension supervisors and grassroots extension workers. The book also will be useful for the preparation of plans, schemes and projects in tribal belts.