I have noticed a wierd yellowing on the tips of afew of my seedlings, im not exactly sure what it is. I have been picking the seed shells off my seedling when the emerged from the soil. Would this cause it to turn yellow at the tips?

[img=http://img03.picoodle.com/img/img03/9/8/26/f_IMG0112m_473c8e4.jpg]

[img=http://img01.picoodle.com/img/img01/9/8/26/f_IMG0117m_79ed900.jpg]


[img=http://img01.picoodle.com/img/img01/9/8/26/f_IMG0115m_f1a69a4.jpg]

So so far i have two great looking seedlings, 2 ok looking seedlings, and one scrawny seedling