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O objetivo deste trabalho foi validar um modelo baseado no índice de vegetação por diferença normalizada (NDVI), para a predição da variabilidade espacial da biomassa acumulada na parte aérea e da produtividade de grãos de trigo. Foram realizadas leituras georreferenciadas de NDVI e biomassa, no final do afilhamento, e produtividade. O modelo proposto permitiu relacionar classes de variabilidade espacial do NDVI e da biomassa, com 81% de correspondência entre elas. Entretanto, a relação entre as classes de variabilidade espacial da produtividade e do NDVI foi menor, com 48% de correspondência. The objective of this work was to validate a model based on the normalized difference vegetation index (NDVI) for the prediction of spatial variability of accumulated biomass in shoots and wheat grain yield. Georeferenced readings of NDVI and biomass, at the end of tillering, and of grain yield were carried out. The proposed method allowed relating classes of spatial variability of NDVI and biomass, with 81% of correspondence between them. However, the relation between spatial variability of yield and NDVI was lower, with 48% of correspondence

Validação de modelo para predição do potencial produtivo de trigo com sensor óptico ativo