ranking factors causing the wheat yield gap in gorgan

ranking the viewpoint of experts and farmers is an approach to determine the factors causing the yield gap. for this purpose, two different questionnaire types but with same questions designed for both agricultural specialists and farmers. after answering, the questionnaires of agricultural experts and farmers were analyzed through ahp and entropy techniques, respectively. both techniques determined and ranked the importance of factors affecting on wheat yield gap based on attributing relative weights to factors with respect to comments provided in the questionnaires. analysis of different experts viewpoints through ahp method showed that inappropriate management of irrigation, lack of good varieties grown genetically, and inappropriate use of basic, broadcast and micro fertilizers are the most important factors causing yield gap in the studied area. the results of analysis of the viewpoints of farmers using entropy technique showed that the inappropriate amount of seed at planting, inappropriate use of micro fertilizer, inappropriate planting depth, lack of good cultivars grown genetically and seed loss at harvest are the most important factors causing wheat yield gap, respectively. with respect to inconsistency in the viewpoints of these two groups, it was recommended that it should be made a strong relationship between agricultural experts and farmers to transfer experts' viewpoints to farmers for decreasing yield gap.