Oddly it didn't move the pH of the soil much, you've no doubt found out that in organic soil, you can't bully the pH. The organisms will adjust it to suit themselves no matter much what you do.
clay, it loosens into very nice coarse soil. Even a little added to hard clay makes a big difference.
I scarcely bother to test the soil any more. Adding all the organic material I can get makes the soil heat up, play host to every sort of fungus and mushroom you can imagine, turn all and sundry shades, and it seems to reach an equilibrium that is not much affected by amendments. After tresting the soil for several years in a row and getting the same neutral, middle of the road results, I quit doing it.
I've come to the conclusion that the soil tests do not have active organic soils in mind. In chemical soils, the macronutrients are there or they aren't and you can measure that. But in organic soils the form that nitrogen and phosphorous take for direct plant use are present only in very small quantities. As the nutrients are depleated by the plants, bacteria are call out of domancy and make more until the balance is restored. The tests apparently have no means of testing that potential.
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