Mineral

Average [g∙(Kg TS)⁻¹]

P value

Fresh hulls

Old hulls

Fe

0.115

0.662

0.004

Na

0.141

0.237

0.235

Ca

1.117

3.157

0.063

Mg

1.228

3.389

0.007

K

6.885

15.357

0.075

Zn

0.023

0.039

0.281

Cd

0.0001

0.0002

0.423

Pb

0.014

0.016

0.423