If we review zigs early pronouncements with an eye towards natural systems, the mystery is readily apparent...
"Crabgrass and plenty of it" No mystery at all here. Dry hot soil and crabgrass; a match made in heaven. It
does tell us there is little fungal presence in a meaningful fashion...
"Rabbits and birds" When manure does not incorporate into soil, we have an obvious lack of biology. Dr. Ingham once told me that the most sure sterilant is dessication, and that is surely the case here. We have lost soil biology through dessication, and that surely means that rather than excess of nitrogen we have nearly none. It has long since volatilized as gaseous nitrogen, as the salts will have tied up the CEC badly and beyond that, biology IS the available pool of N (and P, among others). If they are gone, so is our nutrient pool beyond the CEC, and THAT is locked without said biology... the supposition of excess N does not make sense to me in any fashion... an excess of N would lead to rampant growth of the obviously hungry grass, right?
"Uber compacted soil" Certainly a function of the lack of moisture, but it is not just the cleche at fault here; again it is a lack of biology. No bacterial polysaccharides to aggregate soil particles, no fungal hyphae to act as girders and beams, holding open soil porosity, and it collapses on itself. Beyond the inherent nutrient pool it provides, biology gives us our tilth...
"Thatch>1" " IF we had sufficient moisture and biology present, we do not get thatch. As grass is considered a green for composting because of it's nitrogen content, it tends to be bacterial food. Lignin eating bacteria do the heavy lifting of breaking down thatch, and the complete lack of that leads us to conclude that there is either no bacteria or not enough moisture to sustain said bacteria.
At every point along this way, biology offers sure explanation for our lacks, and solid science for our excesses. We can get a soil test denoting this lack or that excess, but the root causes are not chemical but biological. So what steps are to be taken once we do have our sheet of "facts" in hand? A bag of this? A squirt of that? How do we rectify the obvious lack of biology?
While there are still a few ifs, Paul, I do not find them to be many, but a slim few. IF we find an excess of N, then everything I know about the soil food web, everything that Elaine Ingham has taught for decades, is incorrect. I find that likelihood to be slim indeed... IF the soil tests come back as I predict, then it is a clear case that biology and attending moisture are our severe lacks, and a handbill of chemical constituency will do very little to help with that lack. Compost and water will. But an excess of N? THERE is the biggest if...
Paul, your concern on commercial composts is noted, but it has been my experience in working with some producers and experts that they are for the most part conscientious and committed to good product. While the quality of your average airtight bag does not begin to compare to a fresh, well-crafted heap (and I know of some who have gone to great lengths to procure breathable bags); I have sometimes found homemade composts to be lacking in diversities such as thermophiles or higher level predators in good quantity. Given the same list of inputs I would always expect better results from the larger piles and windrows.
But all composts are not created equal; one must be diligent to assure quality ingredients (the USCC's current rush to embrace Class A biosolids as an "organic" input casts Paul's hesitation in a most reasonable light). But I purchase composts for my own yard regularly as their product exceeds the quality of my own. I know the men I get mine from by name, have shaken their hand and toured their operation, have even peered at their handiwork through a microscope, and found it well and good. Trust but verify (and trust that I am not often given to quoting Ronny Rayguns)

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So here is my prediction synopsis. Ridiculously high salts, characterised in a soil test as high calcium and some excessive traces (the metals mostly). Nearly complete lack of nitrogen and phosphorus. Potassium will be high to excessive. If zig went so far as to get a SFI analysis, we would find no fungal content to speak of, severely depleted bacterial counts, NO protozoa, NO nematodes and a serious lack of moisture. I am thinking biologically first; chemical is an afterthought. Indeed, that is how Nature thinks; I see no fertilizer elves or pesticide fairies in the wild. She deals in life, not chemicals...
Needless to say, I await the test results with great anticipation...
In the interim Paul, can zig at least water?
HG