my plant is wierd!!!!!!!!!!!!!!!!!!!!!!!!!

in the middle of the plant it is turning just slightly yellow what should i dooooooooooo

Need to gets some pics up so people can give you some better advice, just gow to the GROWFAQ and look under plant problems, you could compare the situation but sounds to me like over feeding maybe to much N, cpl pics of my burn, good luck, hope this helps alittle