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Table 1 Characteristics of topsoil (0–30 cm) ±SE (standard error of the mean)

From: Trace element delivery for biogas production enhanced by alternative energy crops: results from two-year field trials

Parameter Reinshof Sömmerling
P mg 100 g−1, CAL 15.3 ± 1.1 11.8 ± 2.3
K 9.5 ± 0.7 20.8 ± 1.2
Mg mg 100 g−1, CaCl2 11.8 ± 0.3 7.1 ± 0.2
Humus % 1.9 ± 0.1 1.9 ± 0.05
Sand % 12.7 ± 0.5 33.5 ± 0.4
Silt 69.4 ± 0.3 49.8 ± 0.1
Clay 17.9 ± 0.2 16.7 ± 0.4
Al %, total 4.7 ± 0.07 4.1 ± 0.09
Fe 1.8 ± 0.03 1.4 ± 0.04
Ti 0.4 ± 0.002 0.3 ± 0.004
Mn mg kg−1, total 704 ± 8 479 ± 23
Cd 0.45 ± 0.02 0.37 ± 0.02
Co 7.1 ± 0.1 8.1 ± 0.2
Cu 14.0 ± 0.2 7.0 ± 0.2
Mo 0.7 ± 0.1 0.96 ± 0.09
Ni 16.5 ± 0.6 11.8 ± 0.6
Zn 54 ± 1 50 ± 1