- Select soil, scoop it out and dry it under shade
- After sieving, take 5 grams of soil and add 100 ml distilled water
- Stir vigorously and filter through cotton wool or filter paper
- Measure the pH of this liquid with test strips or a test meter
An order has been placed and we expect to receive our test strips forthwith. Experimentation will follow.
Update: By comparison, the Oaktron pH2 handheld meter is accurate to 0.1, but costs much more and requires calibration. After writing the post above and heading to the checkout at Amazon with the test strips, I wondered if it was silly to not spend an extra $40 to get the handheld meter. The problem with the meter is that you also need calibration solutions - liquids of known pH that allow you to make sure the meter is accurate. That adds another $20 or so to the cost.