CONTENTS:- 1. Introduction. 2. Review of Literature. 3. Agro-economics Profile of Cuddalore and Thanjavur Districts. 4. Physical Input Structure, Cost and Return Per Acre Among the holding Classes under Various Stages of Agricultural Production. 5. Per Acre Energy Consumption Among the Size holding Classes under Different stages and Overall Farms Production. 6. Factors Determining Per Acre Value of Output Energy under Different Size Of Land Holdings in the overall Farms Production. 7. Factor Classifying the Farms Among The Size in the overall Farms: An Integrated Analysis 8. Summary, Conclusion, Policy Implications And Scope For Further Research.