Help me diagnose these yellow leaves

Hey! These pics are from a really nice commercial operation and I’d like your opinion on the yellowing leaves. I want to say it’s probably due to flushing based on what I know about the grow, but of course it could be any number of things including nutrient burn. What do you all think?

yellow2

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Looks like neut burn and heat damage. Jat a guess

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I would have to second that. Nute burn and heat stress.

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