Using plot-season level survey data and agronomic experiment data that we gathered ourselves in the village, we firstly test the hypothesis of a “technology gap” between non-certified organic and conventional farming to determine the right production function specification. Using a Stochastic Frontier Analysis (SFA) approach, we then calculate EE scores for both organic and conventional plots and then compare the scores. Finally, we compare the calculated environmental efficiency scores between organic and conventional farming. The panel structure of data (five seasons from 2008 to 2010) also allows us to investigate the evolution of environmental efficiency over time.