is this nute burn?

i have four plants right now, im using fox farm for now. this just started like 2 days ago. originally i thought it was getting burnt because i lowered the light but now i think its nute burn because its only happening in my youngest plant and its mostly happening on new growth. ph. about 6.5, temp about 73 F, growing medium is soil, and the plant is about 8 weeks in. just started flowering cycle yesterday.




nute burn. 2.jpgnute burn. 1.jpg
 
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