Step 1: Take Samples
Take samples from different parts of the garden, as soil is seldom
uniform. Make a note of where each sample comes from so that you can
exploit any variations, such as an acidic patch, when you draw up your
planting plan. Add the soil to the chemical solution in the test tube
and shake to mix.
Step 2: Match Solution Colors to the pH Chart
Dark green indicates alkaline soil, bright green is neutral, and yellow or orange indicates acidic soil.
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Single digging is so called because it involves turning over the soil to the depth of a single spade blade.