Quantity-Intensity Relationship of Soil Potassium R package QI version 0.1.0 CRAN Task View: Agriculture (https://CRAN.R-project.org/view=Agriculture) The quantity-intensity (Q/I) relationships, first introduced by Beckett (1964), can be employed to assess the K supplying capacity of different soils based on solid-solution exchange equilibria. Such relationships describe the changes in K+ concentration in the soil solution (or the intensity factor) in relation to the corresponding changes in K+ at exchange sites of the soil (or the capacity or quantity factor). Activity ratio of K to Ca or Ca+Mg is generally used as the variable denoting the intensity, whereas, change in exchangeable K is used to denote the quantity factor. Software Imports: ggplot2 Bappa Das <bappa.iari.1989@gmail.com> Comprehensive R Archive Network (CRAN) Bappa Das [aut, cre] (ORCID: <https://orcid.org/0000-0003-1286-1492>), Debarup Das [aut, ctb] GPL (>= 3) 2022-03-09 application/tgz https://CRAN.R-project.org/package=QI doi:10.32614/CRAN.package.QI