The purpose of the study was to determine the level of knowledge of potato farmers in terms of numerous dimensions of sustainable agriculture. A descriptive research design was used to collect data. A sample of 140 farmers was selected from Ardabil, Namin and Nir townships. The selected farmers were familiar with traditional sustainable practices, such as application of organic manure, crop rotations, non-chemical pest control, and weed management. However, they recognized that synthesized materials have immediate effect on yield and pests. They were well aware of applying them but not informed about their environmental impacts. Despite the importance of plant residue management, the respondents' knowledge was moderate and not acceptable for a sustainable farming system. In the case of tillage practices, except for practices with obvious impact on soil erosion, there was weak knowledge of essential tillage practices such as low tillage and replacing chisel for moldboard and so on. The result of correlation analysis revealed that respondents' knowledge of sustainability was positively correlated with knowledge-based factors, such as level of education, participation in extension education and studying agricultural publications.
