soilassessment (version 0.3.0)

PHConversion: Models for converting soil pH (KCl or CaCl) to the equivalent pH (water)

Description

A suit of functions for converting soil pH (KCl or CaCl2) to the equivalent pH (water)

Usage

PHConversion(ph, model,phtype)

Value

numeric value of equivalent ph (water)

Arguments

ph

a vector or single value of soil ph in KCl or CaCl2 to be converted to ph (water)

model

functional model for relating ph in KCl or CaCl to be converting and equivalent ph (water). Models considered are second order kabala, sadovski, davies, brennan functions. The default is kabala

phtype

KCl or CaCl2 solution for ph. The default is CaCl2

Author

Christian Thine Omuto

Details

ph conversion models are those in the literature

References

Davies, B.E. (1971). A Statistical Comparison of pH Values of some English Soils after Measurement in both Water and 0.01M Calcium Chloride. Soil Science Society of America Journal 35, 551–552. https://doi.org/10.2136/sssaj1971.03615995003500040022x

Kabała, C., Musztyfaga, E., Gałka, B., Łabuńska, D., Mańczyńska, P. (2016). Conversion of Soil pH 1:2.5 KCl and 1:2.5 H2O to 1:5 H2O: Conclusions for Soil Management, Environmental Monitoring, and International Soil Databases. Pol. J. Environ. Stud. 25, 647–653. https://doi.org/10.15244/pjoes/61549

Miller, R.O., Kissel, D.E. (2010). Comparison of Soil pH Methods on Soils of North America. Soil Sci. Soc. Am. J. 74, 310–316. https://doi.org/10.2136/sssaj2008.0047

Sadovski, A.N. (2019). Study on pH in water and potassium chloride for Bulgarian soils. EURASIAN JOURNAL OF SOIL SCIENCE (EJSS) 8, 11–16. https://doi.org/10.18393/ejss.477560

See Also

ME_PHharm, ME_ECharm, ECconversion1

Examples

testdata=data.frame(PHKC=c(6.45,8.34,5.07,12.17, 4.219),TEX=c("Cl","SaCl","LoSa", "Si","SaClLo"))
testdata$PHs1=PHConversion(testdata$PHKC,"kabala","kcl")