Typical Yellowing/dropping?

[Trentski420]

Hi all so I'm in week 4 of a SCROG grow my 2nd grow ever 1st went great however much healthier this time required 2nd support trellis on top the bush is much more dense there fore there are more leaves near bottom not getting light and naturally falling.. however since I'm not very experienced I'd like too post a pic.. is this nute burn or is this typical of yellowing/dropping leaves? And if it's nute burn immobile right?

 

[guymandude]

that's not burn. You say that leaf came from an area that gets little light? How does the rest of the plant look?

 

[Trentski420]

Like a champ lol