Soil testing guides

What the numbers on a soil test report mean, in plain English.

Soil testing
How to read a soil test: pH, phosphorus, potassium, sulphur and mineral N
Plain-English soil test basics: pH (water vs CaCl2), Olsen P, PBI, potassium, sulphur and mineral N, with Victorian pasture ranges and GRDC sampling tips.
Updated 17 October 2026