It is important to identify factors that influence on total factor productivity (TFP) in Thai agriculture because these factors would automatically have indirect impacts on the poverty incidence if the force of agricultural productivity to the poverty is significant. Moreover, these factors would be the major focus for the policy makers and development workers in improving the total factor productivity, which aims ultimately to poverty reduction in Thailand. However, there are numerous empirical studies on those TFP factors in terms of growth and absolute amount. Essentially, the determinants of agricultural productivity in particular country are different and distinctive from others. This section would refer to some studies in indicating of determinants of agricultural productivity in Thailand.