Dirt Cheap

Growing orchids for some years made me aware of so called growing mediums. The trial and error and reading and research has all been an education. And knowing what plants need and why they need it makes having a green thumb a bit easier.  This has become obvious to me with the most basic growing media there is, dirt. Dirt is dirt isn't it? Yep! No argument there. It's that easy, or it could be a thesis for a degree at a university. I think most serious gardeners know where I'm going with this, but still it can be confusing for the most experienced. Of NPK (nitrogen, phosphorous, potassium), nitrogen has been a concern to me, and I had my misconceptions about it. Like what source of nitrogen to use, Urea? Ammonium? Synthetic? Organic? Oh good! There's lightning, that puts nitrogen in the air, and it does, but the atmosphere is already 78% nitrogen. It would be nice if it rained. Rain brings nitrogen to the soil. But that don't help much if the soil doesn't have the bacteria to convert it so it can be used by the plants. Dry, liquid, and organic fertilizers are all good. Certain plants are nitrogen fixing. Hence, the ornamental clover picture above are nitrogen fixing as well as alfalfa and legumes like beans and peas. So  why not? With the vegetables and every place else. Then there's the loam, and the PH, and the acidity. Did you know that clay is a good source of potassium? Truly, you can do no wrong by adding organic material to the soil, but that can get awfully expensive if your not careful. My pitch here is to get you to do a little research and educate yourself so to know how it works. Got mushrooms growing in your soil? Sounds Bad, but look up something called Bio remediation, or Mycoreremediation. To pass on some of my research for nitrogen , this is a good place;
http://www.ces.purdue.edu/extmedia/AY/AY-204.html
Basic soil knowledge you might try this link;  http://soil.gsfc.nasa.gov/soilfert/npk.htm
Then there is a neat infomercial for a book about a secret about tomatoes that I won't issue unless requested via comment, I got from Off The Grid Website. It's OK! I'm a Ham, and I'm immune to propaganda. Hi Hi.

Got this picture from Wikipedia.