I need help identifying problem with leafs

Yellowing starting , Havent giving plants any nutes for a couple weeks, i believe i watered them to long, but then it looks like a iron deficiency. Had fiber optic cable ran they cut my irrigation line so they missed a watering ,i fixed it then ran system on manual watering forgot about it 8 hours later ,now im here

Als0 noticed some leaf curling on a few pic #1 and #3

dont know how to start a new thread but is this burning? brown/greyish new growth