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The expression of the genetic potential of the soybean crop is directly related to the quality of the sowing operation, as well as the use of high vigor seeds and sanitary quality. Phytosanitary treatment of seeds is an alternative used to protect seeds and seedlings in the early stages of development of the crop against the action of pathogens causing damage. In this way, the objective was to evaluate different methods and products used for the phytosanitary treatment of soybean seeds, observing its effect on the performance of a horizontal disk metering. The factors observed were the different methods of phytosanitary treatment of seeds at four levels, rotary drum treatment, addition of polymers in industrial treatment, industrial treatment with addition of graphite and seeds without addition of product (control). The second factor was the different sowing densities at four levels (12, 14, 16, 18 without m-1). The analyzed variables were seed spacings, acceptable, multiple, fail and precision. After the analysis and interpretation of the data, it was concluded that both the graphite solid lubricant and the coating polymers can be used without reducing the quality of the longitudinal distribution of seeds with phytosanitary treatment.

DISTRIBUIÇÃO LONGITUDINAL DE SEMENTES DE SOJA COM DIFERENTES MÉTODOS DE TRATAMENTO FITOSSANITÁRIO POR UM DOSADOR DE DISCO ALVEOLAR HORIZONTAL