Introduction

An investigation of a classic catena from the Southeast. See the source .Rmd for ideas on how to mix narrative, code, and output into a stand-along HTML document. Note that “chunk options” are used in the .Rmd to control the size of figures and text formatting. Images can be included from local sources or via URL. Further background on RMarkdown documents can be found here.

A Classic Catena of Soils

Diagram showing relationship of dominant soils in Lloyd-Davidson association (Soil Survey of Morgan County, Georgia; 1965).

Get basic morphology and series-level summaries.

library(aqp)
library(soilDB)
library(sharpshootR)
library(latticeExtra)


soils <- c('cecil', 'altavista', 'lloyd', 'wickham', 'wilkes',  'chewacla', 'congaree')

# get morphology + extended summaries
s <- fetchOSD(soils, extended = TRUE)

Hillslope Position

res <- vizHillslopePosition(s$hillpos)
print(res$fig)

par(mar=c(0,0,2,1))
plot(s$SPC, plot.order=res$order)
title('Hydrologic Ordering via Hillslope Position Proportions')

Geomorphic Component

res <- vizGeomorphicComponent(s$geomcomp)
print(res$fig)

par(mar=c(0,0,2,1))
plot(s$SPC, plot.order=res$order)
title('Hydrologic Ordering via Geomorphic Component Proportions')

Taxonomic Relationships

Conclusions

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