A Textbook of Agronomy by B. Chandrasekaran; K. Annadurai; E.Somasundaram

By B. Chandrasekaran; K. Annadurai; E.Somasundaram

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Naturally, efforts, should continue to keep the population in check to take full advantage of increase in agricultural production. 6 AN INTRODUCTION TO AGRONOMY The word agronomy has been derived from the two Greek words, agros and nomos having the meaning of field and to manage, respectively. Literally, agronomy means the “art of managing field”. Technically, it means the “science and economics of crop production by management of farm land”. Definition : Agronomy is the art and underlying science in production and improvement of field crops with the efficient use of soil fertility, water, labourer and other factors related to crop production.

Laurasia was made of the present day continents of North America (Greenland), Europe, Angara land comprising Russia, Siberia and China in the north. Gondwanaland was made of the present day continents of South America, Africa, India, Australia, and Antarctica. Notice that at this time India was not connected to Asia. The huge ocean of Panthalassa remained but the Atlantic Ocean was going to be born soon with the splitting of North America from the Eurasian Plate. ‘The Triple Junction’ was formed because of a three-way split in the crust allowing massive lava flows in three directions and poured out lava over hundreds of square miles of Africa and South America.

Agronomy is defined as “a branch of agricultural science which deals with principles and practices of field crop production and management of soil for higher productivity. Importance : Among all the branches of agriculture, agronomy occupies a pivotal position and is regarded as the mother branch or primary branch. Like agriculture, agronomy is an integrated and applied aspect of different disciplines of pure sciences. Agronomy has three clear branches namely, (i) Crop Science, (ii) Soil Science, and (iii) Environmental Science that deals only with applied aspects.

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