SilliamWhale
Member
So who else can I attribute the idea to. You see everybody knows what your on about if you mention Albrecht?
Strictly speaking I'm not sure but a quick google implies it has been around since 1901 at least.
http://www.soils.wisc.edu/extension/pubs/A2986.pdf
But Base Saturation soil testing was not the preserve of Albrecht. I think Kinsey promotes it as an Albrecht system under a trademark as one way of providing Base Saturation soil testing. Its interesting enough but there's no perfect set of numbers alas, too many variables.