“…For example, soil pH was used in all four studies, SOM was used in three cases (Keeney & Corey, 1963;Lemire et al, 2005;McFarland et al, 2020), and KCl-extractable Al was used in two studies (McFarland et al, 2020;Miller et al, 2005). Overall, the four soil property models developed by Keeney and Corey (1963), Lemire et al (2005), and McFarland et al (2020 were shown to be acceptably accurate for estimating LR in their respective regions, based on r 2 values ranging from .71 to .88. However, each model had slightly lower r 2 values than at least one buffer method evaluated in the same study, indicating that, in general, buffer methods were more accurate for estimating lime requirement than methods based on multiple soil test properties (Keeney & Corey, 1963;Lemire et al, 2005;McFarland et al, 2020;Miller et al, 2005).…”