What kind of burn or deficiency?

Looks like heat stress or slightly nutrient burn. Anyway It is nothing so critical. Take it easy and just keep an eye on that!

Hey bud, i agree with @BraveheartGenetics PEACE!

Hi mate, I wouldn't necessarily worry about it now. You seem to be fairly close to harvest and all her energy is going into growing fats buds. I hope this helps, good luck and happy growing

Sorry for asking soil or hydro I just noticed the mix ratio....duh ...anyway it looks to me like you PH levels are above 7/8 you want to keep it around 5.8-6.2....hope this helps

You have a PH problem my friend ...I just experienced this not too long ago. It's a pretty easy fix are u running soil or hydro?

Burnt leaf tips often indicate an over or under feed. Now with the fading yellow does it start at the bottom of the plant and go up or is it just everywhere ? if its mostly at the bottom she probably needs more nitrogen being in late flower they dont need much but they still need a lil bit one dose of N should be enough to get her through until the end if it is that. Also tips going upwards could also be heat stress or the light being too close to the bud. I would advise giving her a dose or whatever your using for your Veg formula :) then see how you go if it clears up or not. also if the ph is high this can happen too. hope this helps best of luck for a hearty harvest :D