skp1994: LLWR Data Set

In soilphysics: Soil Physical Analysis

Description

Data set presented by Leao et al. (2005), for determining the Least Limiting Water Range.

Usage

data(skp1994)

Format

A data frame with 64 observations on the following 4 variables:

BD

a numeric vector containing soil bulk density values, in Mg/m3.

W

a numeric vector containing volumetric water content values, in m3/m3.

PR

a numeric vector containing penetration resistance values, in MPa.

h

a numeric vector containing matric head values, in cm.

Source

Leao et al. (2005). An Algorithm for Calculating the Least Limiting Water Range of Soils. Agronomy Journal, 97:1210-1215.

Examples

data(skp1994)
summary(skp1994)

Example output

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 
       BD              W                PR              h          
 Min.   :1.270   Min.   :0.1900   Min.   :0.200   Min.   :   20.0  
 1st Qu.:1.417   1st Qu.:0.3100   1st Qu.:0.850   1st Qu.:   72.5  
 Median :1.470   Median :0.3600   Median :1.335   Median :  215.0  
 Mean   :1.467   Mean   :0.3452   Mean   :1.624   Mean   : 2697.5  
 3rd Qu.:1.530   3rd Qu.:0.4000   3rd Qu.:2.132   3rd Qu.: 2000.0  
 Max.   :1.650   Max.   :0.4500   Max.   :4.640   Max.   :15000.0  

soilphysics documentation built on Jan. 13, 2021, 7:06 p.m.