Resumo: A soja no Cerrado do sudoeste piauiense ocupa posição de destaque na produção agrícola. No entanto, os níveis de produtividades ainda estão abaixo da média nacional, fato associado, entre outros fatores, à escolha inadequada da cultivar. , e apenas a Monsoy 8527 RR ficou abaixo de 3.000 kg ha -1 . As maiores contribuições de incremento na produtividade foram observadas para cultivares P98 Y70 e Nidera 8843, com 51 e 62%, respectivamente. Palavras-chave: Competição de cultivares. Glycine max (L.) Merrill. Produtividade de grãos. Abstract:The soybean in the southwestern region of the Cerrado in Piaui occupies a prominent position in agricultural production. However, levels of productivity are still below the national average, a fact due, among other factors, to the inappropriate choice of cultivar. The aim of this study was to select the most productive soybean cultivars to be used in the region of the Cerrado in Piauí , and only Monsoy 8527 RR had a productivity of less than 3,000 kg ha -1 . The greatest contributions to an increase in productivity were seen in the P98 Y70 and Nidera 8843 cultivars, with 51% and 62% respectively.
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