10-10-10 is pretty common for a farm... but not really made for turf grass. Starter for Turf Grass is usually x-x-4, so a lot less phosphorous than what we would use for farming.
So not sure how they could update the law to make it more effective.
Slow release can help... in that the turf grass has more time to absorb it... but a soil sample before application would go a long way. Which should be what the professionals are doing; just guessing that they start most lawns.
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