1. Introduction
Concern about the negative impacts of modern agriculture to human health, natural environment and resources
has prompted development and diffusion of an alternative called sustainable agriculture. Sustainable agriculture is
the approach that not only makes to better uses of natural goods and services for human needs without damaging the
environment, but minimizes the use of external inputs. Besides, it enables farmers to use their knowledge and skills
more effectively (Shiri et al. 2012). However, the decision of farmers to adopt a new agricultural technology
depended on complicated factors. One of these factors that influence farmers' perception is the characteristics of the