Hello. I have a small 15x20 vegetable garden for the past 5 years or so and found certain plants just do not grow well. Tomatoes, cuccumbers, some chiles and lettuce grow excellent. But bell peppers, other chiles, zucchini, strawberries (some others) do not do so well. So I picked up a Ferry Morse soil test kit from Lowes. I tilled the garden and proceeded with the test.
The pH test came out "Neutral 7.0", Potash was "Low" but not "Very Low". However, I didn't even get a reading for Nitrogen or Phosphorous? during the growing season I use (I think) Miracle Grow vegetable fertilizer. The one you attach to a garden hose. I'm not sure if the test is accurate where I need to add something to the soil to bring the nitrogen and phosphorous up.