It looks like a fairly accurate test with one exception. They only send a small cup for the sample and most people who see that will just take one small sample. A better way to take a sample is to make a composite sample by taking 8 -12 samples throughout the garden and mixing them together. Then take your small sample from that mix. This way you are getting an average reading from the entire garden and not just one small place.
My soil testing Lab is Pennsylvania State Ag Lab and they also use Melich 3 for testing. It is $9 for each sample tested and I pay my own postage which is about $4 for one cup of test material. I usually add $5 for the optional test for % organic material. I am an organic gardener and I like to check on this.
I am very satisfied with their results.
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