Board Thread:Wiki Discussions/@comment-3238846-20140422105553/@comment-1512913-20140424114205

Evidence against:
 * advanced natures require both hands, one nature in each to be merged
 * Naruto had to use his Tailed Beasts' chakras to do the new Rasengans... if he could do Katon and Doton on his own and merge them, he wouldn't have needed Son Goku's chakra and assistance, not to mention the Shukaku case makes it even more obvious that in the equation Naruto does nothing more than create the Rasengan and the nature transformation part handle the "Tailed Beasts"
 * Naruto doesn't know Fire and Earth, because the only training he did was for Wind and there was no time for further training with being at war and all