Can I use my extech pH60 meter to measure soil pH if so how? I included a link to the meter.
Take a soil sample and mix it with distilled water. The most common ratio used for soil-water pH is 1:1 soil:water. Stir the soil and solution and wait 15 minutes to 1 hour to set the slurry. Measure the pH (check the temperature first).
Here's a great video showing how to do this In the video below it says to do 1:2 (1 part soil 2 parts distilled water) https://youtu.be/int0FevLw8I