ECconversion2 {soilassessment}

A function for harmonizing electrical conductivity of a soil solution to that of the saturated paste extract for all textural classes

Description

This function converts electrical conductivity measurements of soil solution to that of soil paste extract. The ratio of soil:water mix for the solution and conversion method must be indicated

Usage

ECconversion2(ec, method, extract)

Arguments

ec

measured electrical conductivity of the soil solution in dS/m

method

method for converting electrical conductivity of the soil:water mix to that of the soil paste extract. The methods included are USDA, landon, kargas, ozkan, hogg, park, visconti, korsandi, shahid, klaustermeier, and he. The default is USDA

extract

ratio of soil:water in extract solution for measuring electrical conductivity was measured. Example is 1:1, 1:2, etc. Default is 1:1

Details

This function assumes no influence of texture, clay content, etc on the conversion of electrical conductivities

Value

electrical conductivity equivalent for saturated soil extract in dS/m

Note

Models that work with soil solutions in 1:1 soil-water mix are: USDA, landon, kargas, ozkan,hogg, and zhang. Models for 1:2 solutions are: USDA and hogg. Models for 1:2.5 are: ozkan and shahid. landon model also works for 1:3 soil solution. Models for 1:5 are: USDA, landon, kargas, ozkan, chi, park, visconti, korsandi, klaustermeier, and he. The function only works for soil solution mix ratio handled by the respective model.

Author(s)

Christian Thine Omuto

References

Sonmez S, Buyuktas D, Asri FO. 2008. Assessment of different soil to water ratios (1:1, 1:2.5, 1:5) in soil salinity studies. Geoderma, 144: 361-369

Kargas G, Chatzigiakoumis I, Kollias A, Spiliotis D, Massas I, Kerkides P. 2018. Soil salinity assessment using saturated paste and mass soil:water 1:1 and 1:5 ratios extracts. Water, 10:1589, doi:10.3390/w10111589

See Also

ECconversion1, ECconversion3, ECconversion4

Examples

library(sp)
ECconversion2(0.75, "USDA","1:1")
newmap = suitabinput["ec"]
newmap$salinity=ECconversion2(newmap$ec,"hogg","1:1")
str(newmap$salinity)
spplot(newmap["salinity"])