There for awhile, it seemed to me that Steven K. Dick of Tactical Knives was writing editorials every other month telling aspiring knife testers to forget it, only the most experienced outdoorsmen and knife users need apply. Then he would publish one of his own reviews about trimming weeds in his back yard, or going out to his garage to cut some rope: yup, cuts rope! Ha!
Seriously though, if you just want to write about knives, right here is a great place to do it. If you seriously want to publish in the magazines, learn to take some nice photos and spend some time figuring out what really matters to knife nuts. I especially recommend the articles by Anthony Lombardo as good examples to emulate. If you just send in submissions that say, I hacked at this, I hacked at that, the pivot screw is .2475930" in diameter, you won't get a glance.
Hope this is helpful,
Harv