Book excerpt: Definitional Glossary of Agricultural Terms (Vol-1) includes the terms related mainly to agronomy, crop production, sustainable agriculture, agro-ecology, environment, soil science, soil fertility, plant nutrition, organic farming, latest concepts in agronomy, agro-forestry and grassland agriculture, agricultural economics and farm management, etc. It explains, especially the new terms, in a comprehensive and easy to understand way. Very often descriptive text, related terms, synonyms and antonyms are given in addition to the proper definition to help the reader to understand the term in its context and practical use. Although it is primarily a definitional glossary of agricultural terms used in India, but various terms in common use in other developing countries are also included.