Since 2018, together with colleague, Helen Burns from NSW DPI, I have been speaking to advisors and producers about the need to identify pH stratification in paddocks. We promoted the use of a the "Digstick" (also known as a Spurr soil probe) to take intact samples of soil profiles, which can then be treated with a colorimetric pH test kit (available from Bunnings) to identify pH stratification.
Producer of the Digstick, Trevor Spurr reports massive increase in sales of the Digstick as a response. "Just looking at NSW from mid-2017, we have sold just under 150 Digsticks which is about a 300% increase on previous 3yrs."
Given that we recommend sharing Digsticks among groups, the impact is significant.