Certified valuesTotal nitrogen . 0.078 w(N)/10-2Organic matter . 1.63 w(OM)/10-2Cation exchange capacity 11.2 cmol(+)/kg Exchangeable magnesium 1.21 cmo(1/2Mg2+)/kg Exchangeable calcium . 4.2 cmol (1/2Ca2+)/kg Exchangeable potassium 0.40 cmol (K+)/kg Hyd