Table 3.

Lower limit of detection (LLD), minimum, median, average and maximum concentrations determined for 11 nutrients by MMI® extraction of 1190 NGSA catchment outlet sediment samples (0–10 cm, <2 mm)

NutrientLLD (ppm)Min (ppm)Median (ppm)Average (ppm)Max (ppm)
Ca10<103904233680
Cu0.010.010.961.1630.5
Fe1<1420555
K0.11.282.1105.11040
Mg121401932920
Mn0.0050.0793.9906.83159.7
Mo0.005<0.0050.0070.0100.276
Ni0.0050.0060.4110.72316.1
P0.10.051.202.0232
Se0.002<0.0020.0070.0151.28
Zn0.02<0.020.120.4819.5