Phosphorus deficiency? or something else? (Pics Included)

I did some searching around to try and find out what it is. I am guessing it is some sort of deficiency but not exactly sure on the type. I did look on http://www.marijuana-seeds.net/Thanks-ThankYou.htm and it does sort of resemble a phosphorus deficiency. It is only those two bottom leaves that have it all the others are healthy.

 

Look here; http://www.mjguide.com/modules.php?name=Tutorials

Then click on; Comprehensive Plant Problem Solver