Kolors

Got a slight potential problem, Im growin 5 plants all under the same conditions but 2 are much shorter than the others and they are starting to yellow on the very bottom leaves near the ends? Is this a classic case of nitro def? they all have the exact same water conditions ect? why only these 2? any help would be appreciated.
FACTS:
Been veggin for bout 30 days
Gro lux flouro lights with cfls
small fan
water twice a day with a spray bottle
using schultz 10-15-10 plant food which states "7 drops every watering on everything u grow" and the other 3 have responded well to this treatment so why 2 midgets. BTW its bagseed

Anyway you can get some pictures on here?

Here R my pix, so what am I doing wrong

pic 1 is plant 1
pic 2 is plant 2
pic 3 is one compared to another sprouted the same time

any ideas? anyone?

I think your right about nitro def. It might just be "hot spots" in your soil. Could be the soil isnt mixed that good or settled during storage