This book is mainly intended for the agricultural courses of graduate students in the field of agriculture, and horticulture. Semester system of education of B.Sc.(Ag.), and B.Sc. (Horti.), students are quite dynamic for which the students are to be helped for changeover. We can identify their difficulties for comprehensation of language, non-availability of textbooks for their semester system. There is a need to use simple language. The present book titled "A Text book of Agriculture" suite to the need of students. This book is written in simple understandable language dealing with various subject matters of agriculture to keep the syllabus on ICAR. In general, the courses dealt to the graduate students are principles of agricuture, agricultural heritage of India, principles of weed science, field crops and biofuel crops. This book has been prepared with a specific purpose of importing complete comprehensive information about agronomy and we hope that the students and readers will find this with much utility. We are sure that this book will serve as valuable text-cum-reference book to the graduate students of agricultural universities. "