help yellish lefes trough the plant (not in the bottom)

hello there im having some plants that are growing whit tomatos that are turning a yelish color in the entire body what seem to be the prob???because i have other and their fine only a bit yelish on the sprouts which is normal....
any help is apreciated
ps the good is the what i take has they should look and the other files are the one im having troubles and yes im using a fertilizer a bionova soil mix

looks to me like nitrogen diff. to me, but you would probably get better responces in the Plant Problems section.

oki thanks:thumbsup: