The Correct Answer is Principles and practice of crop production. Agronomy is a branch of agricultural science that deals with the study of crops and the soils in which they grow. Agronomists work to develop methods that will improve the use of soil and increase the production of food and fiber crops. AGRONOMY: consists of two Greek words i. e. Agros =field, Nomos = to manageIt is mainly based on the following basic principles:AgrometeorologySoils and Tillage, Soil and Water Conservation, Irrigation Water Management, etc. It has three distinct branches: Crop Science (mainly field crops) Soil scienceEnvironmental Science (that deals with applied aspects)