I've got compacted clay. The areas that really popped were the ones that I poured woodchips on the sheet poop from last year's meat birds. I couldn't abide the smell after a night's worth of poop, so woodchipped it. I've been pondering this, the poop boost starts the growth, but the added carbon content of the wood chips as they get incorporated really feed the soil.
I'd suggest that you add carbon to fluff the sand/clay that you have. The carbon helps my clay absorb water and runoff appears to be better.
Feed the soil.