Objective Crop Physiology is a comprehensive, exam-oriented book designed to provide a clear, concise, and systematic understanding of the fundamental and applied aspects of crop physiology, tailored especially for competitive examinations such as ICAR-JRF, SRF, NET, State Agricultural Services, and other allied tests. The book covers all essential topics including plant water relations, mineral nutrition, photosynthesis, respiration, growth and development, plant growth regulators, photoperiodism, vernalization, seed physiology, stress physiology, crop productivity, and post-harvest physiology, along with modern advancements in the field, presented in an objective format that facilitates quick learning, revision, and self-assessment. It is ideally suited for undergraduate and postgraduate students of agriculture, aspirants preparing for national and state-level competitive examinations, teachers, extension workers, and professionals seeking a reliable and quick-reference guide to crop physiology, making it a valuable resource for both academic excellence and competitive success.