Figure 4
From: Effects of fine grinding on mid-infrared spectroscopic analysis of plant leaf nutrient content
Boxplots of R2, root mean square error (RMSE), the ratio of performance to deviation (RPD), and bias for the prediction of 4 properties for each level of fine grinding for ATR (top) and DRIFT (bottom) spectroscopy techniques. Each boxplot is labeled with Tukey’s significance letters (p < 0.05) for comparison purposes. Fine grinding levels are in minutes.
