Since scoring in any objective or subjective exam require good writing skills, quality in the answer, completion of the answer within the stipulated time and word limit with originality difference and accuracy components. So while designing the book special emphasis was given on inclusion of the key words, analytical, systematic and compact presentation and to cover the different dimensions of the various topics to make the answer writing qualitative, effective and scoring. Focus is given on the bullet form presentation instead of paragraphs to facilitate the quick revision and easy memorization of the same to make the content easily reproducible in the examination. All the recent concepts and approaches with relevant issues to extension are incorporated to provide necessary details of the modern concepts in ucid form. All most all topics of extension are covered under eight chapters to provide all the extension related material in one book.