Fig. 1.

Relative standard error of prediction of Near-infrared spectroscopy (NIRS) predictions of crude protein and indispensable amino acids developed on the total dataset or the 3 subgroups, cereals, mixtures and supplemental feed ingredients. CV of reproducibility is the coefficient of variation (%) for between laboratory standard deviation from 36 to 46 single determinations of amino acids in broiler finisher feed reported in the method standard ISO 13903:2005 – Determination of amino acid content. Relative standard error of prediction = SEP/mean of lab values × 100.