Originally Posted by heritage
Nice work Kiril with that soil type.
I am wondering though if The A horizon is where you get your Ca/Mg ratio and pH reading from......
The B horizon sure......
Quite an Organic layer on the top.
Soil cores were taken at 8-10 inches with all the organic matter discarded for testing. The results include both the consolidated clay and aggregated clay and I would consider both as A horizon. The compost on top is ~ 1/2" thick on average.
One might make an valid argument to test the two layers independently given the differences, however given this is turf I am not inclined to make that distinction.
The Ca:Mg and pH are a result of inherent properties of the soil and irrigation inputs. Irrigation water runs high in Mg with a pH of 8.3-8.5.