The objective of this study was to 1) to study the efficiency of rice production for health and other rice varieties grown in the Northern region and 2) to compare the cost and the return of healthy rice product. Another popular growing area in the Upper North. Using the model Meta-frontier to analyze the longan production efficiency. The Tobit model was used to analyze factors affecting farmers' productivity. It also uses cost and return analysis to find the value for money. The study found that. Most of the farmers are educated in elementary and junior high school. Plows and pumps are the main agricultural property. It has its own farmland, but uses rainwater and irrigation water for cultivation. For data analysis, the efficiency of rice growers was higher than that of healthy rice. The average rice yield was significantly higher than that of the healthy rice farmers (0.9439> 0.8604). The Economy of Scale in the overall picture of the effect on the size of the increase. But for the effect on the size of each group is in the range of the effect on the fixed size.
The average net return of rice farmers was lower than that of healthy rice farmers at all levels of efficiency. The highest average return was obtained from rice farmers with high efficiency at 4,296.92 Baht per Rai. When the excess factor is adjusted in accordance with the performance analysis, the net return is higher. The most effective rice growers were farmers at the level of 7,170.76 Baht / Rai. The number of laborers was statistically