1st node leafs yellowing! Please take a look and Help

[Clidefroggg]

Why are the bottom most leafs yellowing, I'm not using any nutes, and I'm growing in fox farm ocean Forrest soil, one is pretty much completely yellow and the other one is just about there. If these die off is it normal? It's not the first seed leafs but the set after that, what do I do
Other than that the other leaves look pretty healthy expect I did loose one yesterday due to a fan falling
I appreciate any help

 

[David Bowman]

Your soil looks a little moist. I'd let the pot dry out for a few days to a week and see if it responds.

 

[Clidefroggg]

That's because I watered it yesterday and I usually only water it when the soil is dry about an inch deep..... I was looking around and do you think it could be N-deficient?

 

[David Bowman]

It looks like N-deficiency, how old is the plant, what size of pot?