. . "Spectrally measured and converted to Mehlich3 method (extractant 0.2 N CH3COOH + 0.25 N NH4NO3 + 0.015 N NH4F + 0.013 N HNO3 + 0.001 M EDTA)" . . "Extr_m3-spec"@en . . "Extr_m3-spec" . .