This book is an attempt to familiarize the readers with the concept of innovation and its various dimensions and the changing views on innovation in the field of agriculture. Beginning with the diffusion of technological innovations, the scenario gradually paved way for prominence of disruptive innovations and presently, degrowth innovations are emerging as relevant in agriculture. The book is primarily targeted to students of Agriculture and allied fields, focused on students of Extension education. It is expected that the general public will also find this publication useful to gain an awareness about the different dimensions of innovations in the field of agriculture. The students preparing for the competitive examinations will also find this book quite useful. Contents: Foreword. Preface. 1. Introduction. 2. Evolution and dynamics of innovation process. 3. Innovation ecosystem. 4. Diffusion of technological innovations in agriculture. 5. Disruptive innovations in agriculture. 6. Innovation and entrepreneurship in agriculture. 7. Degrowth innovations in agriculture. 8. Innovation management and innovation intermediaries in agriculture. 9. Innovations in science of delivery related to extension services. 10. Epilogue. Annexures. Index.