Thank you all for the thoughtful discussion and advice. If the soil is really poor then perhaps completely starting over is the only option. By poor I mean compacted anaerobic clay. I guess aeration plus compost and bacterial compost tea might work but I could only imagine that it is a long and slow process. It is not uncommon that soils are so acidic moss grows alongside the grass in lawns. At any rate thank you for the responses. I guess that it can't be helped. Is there any process by which I can reasonably guess the viability of the aforementioned tools to cure poor soil? I don't want to waste the client's time or money.
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