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0.96). Accordingly, the NR prediction model was developed using NNI values and day after planting (DAP). Then, accuracy and performance of the NR-NNI relationship were verified by the second experiment data. The values obtained for RMSE, NMB and NRMSE statistical indicators were less than 1 kg / ha, 0.10% and 3.10%, respectively, which indicates high accuracy of the model for prediction of crop nitrogen requirement. In general, results showed that estimation of crop NR based on the concept of Nc could be used as a scientific and suitable approach for managing nitrogen application in agricultural production.]]>
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