Fig. 2
From: Legume-based rotation enhance long-term soil carbon storage in eastern Oregon dryland wheat systems
Scatter plots of measured and predicted values of (a) total carbon (TC); (b) carbon content in mineral-associated organic carbon (C-MAOM); (c) total nitrogen (TN); carbon content in particulate organic matter (C-POM); resulting from cross-validation using MIR-PLS regression by using present-day samples in soil derived from the wheat and pea experiments at different soil depths. The 1:1 line is plotted in black in each plot, the regression line in red and the shaded area indicates 95% confidence interval. Repeated 5–fold cross–validation was used as the resampling method.
