I have had a few people enquire about getting a sap pH Meter for doing test 2.4.
The one suggested on the website is this Horiba LAQUA Twin B-711: http://www.horiba.com/laquatwin/en/lineup/index.html#ph
Does anyone have any experience of using it? When I saw Graeme Sait speak at Groundswell last year he talked a lot about using sap pH as an indicator of plant and soil health. I wonder as an organic farmer how helpful it is as a measure to inform management decisions. If the pH of a plant is too high or too low how would that inform our actions?
( Extra: It appears the B-712 is sold more widely (like here), it’s slightly more expensive, but it seems that the main difference is just that it can give readings to a higher resolution of 0.01, rather than the B-711 which just does up to 0.1 accuracy. )