A a case study in Ayutthaya Province in the central region of Thailand Ullah, Asmat creator Perret, Sylvain Roger Chairperson Marpaung, Charles O.P. Examination Committee Soni, Peeyush Examination committee Higher Education Commission (HEC), Pakistan Scholarship donor Asian Institute of Technology Fellowship Scholarship donor text series technical report th Pathum Thani, Thailand Asian Institute of Technology 2009 continuing eng 1 online resource (44 leaves) : ill. Rice is not only the staple food of many countries but it is also a source of earning of millions of people. In Thailand, rice farming is the majorsource of income of the farmers which is highly dependent on the energy inputs. There is a complex relationship between energy use pattern and rice yield. This study was performed to examine the energy use pattern of the rice growers depending upon the size of the farms and its relationship the crop production in the Ayutthaya province in central region of Thailand. Its subjects are the field practices, technology use and chemical inputs. Information was collected through the field survey. Results shows that mean energy output-input ratio of small farmers is higher with low specific energy and high energy productivity than the large farmers. Energy ratio is 8.20 in small farms, 7.00 in medium farms and 6.02 in large farms. Submitted in partial fulfillment of the requirements for the degree of Master of Science in Natural Resources Management, School of Environment, Resource abd Development Research Studies Project Report (M. Sc.) - Asian Institute of Technology, 2003 Rice Irrigation Thailand Ayutthaya Irrigation farming Thailand Ayutthaya Asian Institute of Technology. http://203.159.5.9/ait-thesis/detail.php?q=B01467 http://203.159.5.9/ait-thesis/detail.php?q=B01467 110315 20260817173321.0