Table 2.
Mean concentrations of calcium carbonate and REEs, expressed on the basis of dry matter; mean, standard deviation (s.d.), minimum (Min) and maximum (Max) of REEs elements (in mg·kg−1). N number of samples
| Type of horizon | CaCO3 | Ce | Nd | La | Y | Sc | |
|---|---|---|---|---|---|---|---|
|
Surface (Ap) |
N | 90.0 | 90.0 | 90.0 | 90.0 | 90.0 | 90.0 |
| Mean | 17.1 | 70.6 | 32.9 | 36.2 | 21.6 | 13.7 | |
| Stad Desv | 13.1 | 33.7 | 15.9 | 15.4 | 5.1 | 3.0 | |
| Min | 0.0 | 18.8 | 9.7 | 6.6 | 8.9 | 6.3 | |
| Max | 57.8 | 227.8 | 115.9 | 99.2 | 33.9 | 19.8 | |
| Kurtosis | 0.0 | 6.0 | 9.1 | 3.3 | − 0.3 | 0.0 | |
|
Subsurface (B or C) |
N | 81.0 | 81.0 | 81.0 | 81.0 | 81.0 | 81.0 |
| Mean | 23.1 | 67.6 | 31.8 | 34.4 | 19.6 | 13.9 | |
| Stad Desv | 19.0 | 59.4 | 28.8 | 27.6 | 6.9 | 4.2 | |
| Min | 0.1 | 7.0 | 5.2 | 3.9 | 5.5 | 4.6 | |
| Max | 66.7 | 432.1 | 203.9 | 202.6 | 35.7 | 22.3 | |
| Kurtosis | −0.5 | 22.1 | 23.9 | 20.5 | −0.5 | −0.4 | |
|
Enrichment factor (A/B or A/C) |
0.74 | 1.04 | 1.04 | 1.05 | 1.10 | 0.98 |