To investigate both the organic and conventional farming performance in Sancha village, we collected data on inputs and output of paddy rice production by means of a household survey. Combined with the agronomic experimentation data on nitrogen content for each input provided by the local agronomist (see Table A2 in Appendix B for more details),we were able to calculate the pure nitrogen input as well as the nitrogen balance of soil surface for both systems.9 Table 2 presents a comparative summary of agricultural and environmental performance between conventional and organic farming during five consecutive crop seasons (from 2008 to 2010).