Chemical agricultural inputs (e.g. pesticides and fertilizers) pollute the environment and undermine food safety. In fact, agriculture is in a direct relationship with the environment and farmers’ behaviours have extensive positive or negative impacts on it. Therefore, enhancing farmers’ behaviours to go towards organic farming methods represents a promising approach. The present study aimed to explore the effective factors underpinning the willingness of potato farmers in the Ardabil Plain to adopt organic farming using an extended model of the Theory of Planned Behaviour. The statistical population was composed of all potato farmers of the Ardabil Plain, of which a sample of 200 farmers was selected by Cochran’s method (n = 200). Data collection instrument was a questionnaire whose validity was confirmed by a panel of experts and its reliability by Cronbach alpha. Data were subjected to statistical analyses in the SPSS₂₃ and LISREL_8.80 software packages. The results of structural equations showed that the variables of attitude, subjective norms, perceived behavioural control, moral norms, and environmental concerns accounted for 72% of the variance of potato farmers’ intention to engage in organic farming. Also, environmental concerns captured 43% of this variance.

化学农业投入物（例如农药和化肥）污染环境并破坏食品安全。实际上，农业与环境有直接关系，农民的行为对其产生广泛的正面或负面影响。因此，增强农民的行为以采用有机耕作方法是一种很有前途的方法。本研究旨在探索有效的因素，这些因素可增强阿尔达比尔平原马铃薯农民采用计划性行为理论的扩展模型采用有机农业的意愿。统计人口由Ardabil平原的所有马铃薯农民组成，其中采用Cochran方法从200名农民中选取了一个样本（n = 200）。数据收集工具是一个问卷，其有效性已由专家小组确认，其可靠性已由Cronbach alpha确认。数据在SPSS ₂₃和LISREL _8.80软件包中进行了统计分析。结构方程式的结果表明，态度，主观规范，感知的行为控制，道德规范和环境关注等变量占马铃薯农民从事有机农业的意向变化的72％。同样，对环境的担忧也弥补了这一差异的43％。