Agroecology studies the processes related to agriculture in an ecological system whereas agroecosystem is the fundamental unit of it. These systems are not limited to farming but also contain surroundings regions affected by these activities for example forest gardens. This book presents topics of key importance such as agricultural commercialization, climate change, small scale irrigation technologies, biotic and abiotic constraints, seed germination, etc. It also covers in detail some existent theories and innovative concepts revolving around these disciplines. Coherent flow of topics, student-friendly language and extensive use of examples make this book an invaluable source of knowledge. It is a beneficial text for ecologists, environmentalists, agriculturists, professionals and students alike.