Genetic engineering is the science that is concerned with the direct manipulation of an organism's genes using the techniques of biotechnology. It has vast applications in the field of agriculture. The development of genetically modified crops for the production of genetically modified food is a modern example of crop engineering. Such utilization of genetic engineering tools to augment agricultural productivity is in the domain of agricultural biotechnology. It involves the use of molecular diagnostics and markers, vaccines and tissue culture to develop modifications in crops. Other techniques of crop modification are induced mutagenesis and polyploidy, crossbreeding, genome editing, etc. The traits in crops that are of economic interest are herbicide tolerance, disease resistance, insect resistance and temperature tolerance. This book unravels the recent studies in the field of crop improvement. Also included in this book is a detailed explanation of the various concepts and techniques of genetic engineering for crop production. Students, researchers, experts and all associated with this field will benefit alike from this book.