HELP!!!

[smokinlungz420]

My leaves are turning yellow, drying up, and dying starting from the older ones to the newer ones. I thought it was nitrogen deficiency, and added ammonium nitrate, but it was no use, and it's really getting bad. I need help ASAP!!!

[stinkyattic]

Ammonium nitrate = WAAAAAY too harsh for seedlings, and at the wrong pH.
That plant is probably toast.
Never give fertilizer before the 4th set of adult leaves has unfolded.
The soil is way too wet.
The plant is far too deep in that pot, so that air flow around the stem is impeded.
REad the link in my sig. It will help.