I am not sure most people would know that adsense people really look at your submission before they allow you to join adsense. You have to keep in mind few things before you apply, these are
you must have a full launched website (if blog isnt old enough it won't going to be approved).
website with more page and more text on those pages is better (coz google love text).
no illegal stuff.
traffic you are getting
must have solid theme rather than some article revolving around high paying keywords
for more detail visit https://www.google.com/adsense/policies