jacobs2000: Soil Morphologic Data from Jacobs et al. 2002.

In aqp: Algorithms for Quantitative Pedology

Soil Morphologic Data from Jacobs et al. 2002.

Description

Select soil morphologic data from "Redoximorphic Features as Indicators of Seasonal Saturation, Lowndes County, Georgia". This is a useful sample dataset for testing the analysis and visualization of redoximorphic features.

Usage

data(jacobs2000)

Format

A SoilProfileCollection object.

References

Jacobs, P. M., L. T. West, and J. N. Shaw. 2002. Redoximorphic Features as Indicators of Seasonal Saturation, Lowndes County, Georgia. Soil Sci. Soc. Am. J. 66:315-323. doi:10.2136/sssaj2002.3150

Examples

# keep examples from using more than 2 cores
data.table::setDTthreads(Sys.getenv("OMP_THREAD_LIMIT", unset = 2))

# load
data(jacobs2000)

# basic plot
par(mar=c(0, 1, 3, 1.5))
plotSPC(jacobs2000, name='name', color='matrix_color', width=0.3)
# add concentrations
addVolumeFraction(jacobs2000, 'concentration_pct',
col = jacobs2000$concentration_color, pch = 16, cex.max = 0.5)

# add depletions
plotSPC(jacobs2000, name='name', color='matrix_color', width=0.3)
addVolumeFraction(jacobs2000, 'depletion_pct',
col = jacobs2000$depletion_color, pch = 16, cex.max = 0.5)

# time saturated
plotSPC(jacobs2000, color='time_saturated', cex.names=0.8, col.label = 'Time Saturated')

# color contrast: matrix vs. concentrations
cc <- colorContrast(jacobs2000$matrix_color_munsell, jacobs2000$concentration_munsell)
cc <- na.omit(cc)

cc <- cc[order(cc$dE00), ]
cc <- unique(cc)

par(bg='black', fg='white')
colorContrastPlot(cc$m1[1:10], cc$m2[1:10], labels = c('matrix', 'concentration'))
colorContrastPlot(cc$m1[11:21], cc$m2[11:21], labels = c('matrix', 'concentration'))


# color contrast: depletion vs. concentrations
cc <- colorContrast(jacobs2000$depletion_munsell, jacobs2000$concentration_munsell)
cc <- na.omit(cc)

cc <- cc[order(cc$dE00), ]
cc <- unique(cc)

par(bg='black', fg='white')
colorContrastPlot(cc$m1, cc$m2, labels = c('depletion', 'concentration'))

aqp documentation built on Sept. 8, 2023, 5:45 p.m.