“…Their position in the biplot is explained by their very high content of sand (99% and 96% respectively), high pH values (8.7 and 8.5 respectively), and low OM content (3.85 and 5.55 g kg −1 respectively). These results confirmed the importance of OM and Al/Fe content in Se retention and the fact that sand fraction is a weak Se carrier (Chi et al, 2019;Coppin et al, 2006;Saeki and Matsumoto, 1994).…”