The Davies equation plays a featured role in this take on pig manure “Calculating pH in Pig Manure Taking into Account Ionic Strength,” A. M. Nielsen, H. Spanjers and E. I. P. Volcke, Water Science & Technology—WST Vol 57 No 11 pp 1785–1790. Doi:10.2166/wst.2008.099. (Thanks to Adam Eyring for bringing this to our attention.) The […]