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Measuring the pH of a soil sample
Whether for commerce or recreation, gardeners are expressing a growing interest in taking accurate pH measurements of soil samples. The pH of soil indicates more than its alkalinity or acidity strength, it affects the relative availability of nutrients, the soil life, and the type of plants that will thrive. What is the best method to measure the pH of a soil sample? Most pH electrodes are designed to measure a liquid sample which presents a challenge.
A: You can use almost any pH electrode to measure soil. Just insert the probe into moist soil and wait a few minutes for a measurement. It just takes longer for the readings to stabilize.
B: Only conductivity measurements should be used in soil testing.
C: You can use almost any pH electrode to measure soil. You will need to mix the soil with deionized (DI) water before measuring.
D: Only pH paper (litmus paper) can be used for measuring the pH of soil.
Posted by bdumey 
