This data set refers to physical soil variables related to soil compaction.
A data frame with 50 observations on the following 4 variables.
a numeric vector containing soil penetration resistance values (MPa).
a numeric vector containing soil bulk density values (g / cm^3).
a numeric vector containing soil moisture values (cm^3 / cm^3).
a numeric vector containing soil preconsolidation stress values (kPa).
Loading required package: rpanel Loading required package: tcltk Package `rpanel', version 1.1-4: type help(rpanel) for summary information Loading required package: MASS Loading required package: tkrplot --- soilphysics version 3.1 Warning messages: 1: no DISPLAY variable so Tk is not available 2: loading Rplot failed PR BD Mois PS Min. :1.800 Min. :1.00 Min. :0.1300 Min. : 76.0 1st Qu.:3.600 1st Qu.:1.10 1st Qu.:0.1725 1st Qu.:120.0 Median :4.650 Median :1.20 Median :0.2400 Median :178.0 Mean :4.558 Mean :1.25 Mean :0.2454 Mean :182.4 3rd Qu.:6.000 3rd Qu.:1.40 3rd Qu.:0.3000 3rd Qu.:223.0 Max. :6.800 Max. :1.60 Max. :0.3800 Max. :311.0
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