soils: Soil composition data
In Rkabacoff/qacr: Functions to Facilitate Data Science Projects

Description Usage Format Details Source Examples

Soil Compositions of Physical and Chemical Characteristics

soils

A data frame with 48 rows and 14 variables:

Group: grouping variable with 12 levels, corresponding to the combinations of Contour and Depth
Contour: character variable with 3 levels: Depression Slope Top
Depth: character variable with 4 levels: 0-10 10-30 30-60 60-90
Gp: character variable with 12 levels, giving abbreviations for the groups: D0 D1 D3 D6 S0 S1 S3 S6 T0 T1 T3 T6
Block: a factor with levels 1 2 3 4
pH: soil pH
N: total nitrogen in %
Dens: bulk density in gm/cm$^3$
P: total phosphorous in ppm
Ca: calcium in me/100 gm.
Mg: magnesium in me/100 gm.
K: phosphorous in me/100 gm.
Na: sodium in me/100 gm.
Conduc: conductivity

Soil characteristics as measured on samples from three types of contours (Top, Slope, and Depression) and at four depths (0-10cm, 10-30cm, 30-60cm, and 60-90cm). The area was divided into 4 blocks, in a randomized block design. (Suggested by Michael Friendly.)

Rdatasets from vincentarelbundock github