Table 3.

REE concentrations (mg kg⁻¹) in this study and various countries of the world according to different authors

		Average concentrations (mg kg−1)
Country	Authors	Ce	Nd	La	Y	Sc
Germany	Hu et al., 2006 Salminen et al., 2005- El-Ramady, 2010-	5.92 48	2.53 20	- 23	-	- 6.1
Japan	Hu et al., 2006 Yoshida et al., 1998	39.80 40	17.60 18	- 18	-	-
Australia	Hu et al., 2006 Diatloff et al., 1996	60.49 60	14.63 15	15	5.3	-
China	Hu et al. 2006 Lijun et al., 2004-Li X et al., 2013- Zhang et al., 2008  Zhang et al., 2008 Wei et al., 1991	77.32 67 95.5 64.7	29.31 26 30.5 25.1	- 67 41.3 37.4	- 27	- 12
EU	Hu et al., 2006 Laul et al., 1979	25.67 67	9.98 30	- 30	- 16	- 9.9
Brasil	Oliveira et al., 2012 Silva et al., 2016	82 43.5	25 17.7	20 20.8	7.8 4.45	18 3.31
France	Salminen et al., 2005	63	27	31	9.3	9.3
Sweden	Sadeghi et al., 2013	37.8	15.1	17.4
Spain	Salminen et al., 2005 Jiménez-Ballesta et al., 2010	63 57.7	28 21.6	33 23.6	-	10 23.6
Spain	In this study	70.6–67.6	32.9–31.8	31.8	21.6–19.6	14.0