Bests & Worsts Reviews from Amazon

We originally tested 3 points in a new 40x60 plot we had just cleared. We expected it to be very acidic and depleted of nearly all nutrients, as the plot had no worms and had acid-loving weeds growing in it. All points were very similar; pH very low, N beyond depleted, P depleted to deficient, and K beyond surplus. K was surprising, but the rest were right as expected, except that the N test stayed clear (not pink at all). We followed the recommendations to get it closer to correct, assuming the results to be accurate (lime, triple superphosphate, nitrate of soda), even going beyond the maximum amount they recommend in one dose. After a few good rain storms, we tested the soil again at the same spots. The potash/K was the same, pH seemed to have moved 1 point as expected, P seemed slightly better (barely adequate), but the N test was still completely clear. So, as a verification test, we dissolved a small scoop of 55% nitrogen into an equal amount of water and tested that... still clear. Apparently a very high concentration of nitrogen in distilled water is depleted? This throws the whole kit into question. Would not recommend.