What is agronomy?

‪@gbpscience322‬
Agronomy word is made up of two Greek words - Argos which means field and nomes which means management. So Management of field is known as agronomy.
Agronomy is a branch of agriculture dealing with field crop production and soil management on sustainable basis.
Or Agronomy is a branch of science deals with the principles and practices of soil, water and crop management.