I have relatives and friends who are wheat farmers. I have heard them talk many times about how snow has Nitrogen in it. Here is a bit of information that supports that idea. I am ging to add a couple of scoops of our fresh blanket of snow we received Monday and yesterday to my big plastic tub I have, with my ready to go soil when I get my smart pots ready, after my children return to school tomorrow. They have been out for last two days due to blizzard conditions M and Tues. Here's the info; There is something else that happens when it snows: nitrogen is deposited by the snow and absorbed either into the soil food web residing and active at low temperatures or by plants as a result of nitrogen fixation, a microbial activity which, astonishingly enough, can take place even at low temperatures. Even when the soil is frozen, its eventual thaw can result in the absorption of nitrogen. I had always been just a bit skeptical of the fact that snow contains nitrogen. My research when I was first asked this question back in the late '70s -- which I don't need to remind you was pre-Internet and Google -- failed to turn up any reliable data confirming what I considered to be just another gardening wives' tale. Read more here: Blanket of snow is a poor man's fertilizer | Jeff Lowenfels | ADN.com