VariablesVariables (legacy): Transect Label: Transect Definition: Identifies transect line. Type: Nominal Missing values: None specified , Horizon Label: Soil Horizon Definition: Identifies the soil horizon from which the sample was taken. Type: Code list Codes: A = A horizon E = E horizon B = B horizon Missing values: NA = , Site Label: Site Definition: Unique identification of the location of the experiment or sample. Type: Nominal Missing values: None specified , BD Label: Bulk Density Definition: Bulk density of the sample of interest. Type: Physical quantity Unit: gramsPerCubicCentimeter Maximum: Not specified Minimum: Not specified Precision: 0.100000001490116 Missing values: NA =