Maintenance and sustainability of agricultural products sources are considered as the significant principles of sustainable agriculture while healthy products and continuity in production are dependent on the development of sustainable agriculture. The main purpose of this study is to evaluate the sustainability rate of cropping systems which are commonly used in Jahrom region, Iran. The study is descriptive and analytic; making use of Cochran formula, the sample size was estimated as 100 individuals who were studied based on a questionnaire in multiple cropping system or poly-cropping and single cropping systems or monoculture (wheat). The results indicate that 58% of cropping systems tend to unsustainability in Jahrom region; just 12 % of systems are categorized as sustainable while 30% of these cropping systems are relatively sustainable. Comparisons done on mean of sustainability indices in cropping systems show that the mean of sustainability in indices such as the type of cropping land, sustainable agriculture knowledge, function in a year and the attitude toward sustainable agriculture in multiple cropping systems are more significant than these indices in single cropping systems. In addition, Index of social participation (mean value) and ecological features in single cropping systems are more than these factors in multiple cropping systems. The estimated results of regression model indicate that the effective factors on sustainability of studied cropping systems include variables of land ownership, the entire cropping land, social participation, sustainable agricultural knowledge, and the obstacles in achieving sustainability in agriculture which covers and describes 70% of changes in dependent variables.

The study was conducted in Bam in 2019 to develop an index to quantify sustainability of cropping systems in the region. The studied cropping systems included single-cropping systems (palm trees) and multi-cropping systems (citrus, palm trees and alfalfa). The studied indices included economic, social, agricultural indices, as well as, personal features, market access, features of communication, education-extension activities, sustainable agricultural knowledge, attitude towards sustainable agriculture, and obstacles facing sustainable agriculture. The results indicated that the amount of sustainability index was lower than the mean value in 0.56% of the farms and this index was higher than the mean value in 0.44% of the others. Comparison of the mean value of sustainability indices in the studied cropping systems indicated that the mean indices of the type of cropping system, attitude towards sustainable agriculture and extension training activities in multi-cropping systems were more than single crops. The mean indices in social participation and the obstacles facing sustainable agriculture in single cropping systems was more than the multi-cropping ones. Some indices including social participation, sustainable agricultural knowledge and education-extension activities in multivariate regression model  remained in the final model as variables that had the largest contribution in the rate of change in the dependent variable (sustainability) and explained = 60% of the changes in the dependent variable. The study showed that the sustainability of multi-cropping systems was more than the single-cropping ones.