Most Fertilizers Have Nitrogen.
well i have to say if you put it in a list it will look like this:eggshellssodamilksalt.......
liquid because powdered just sits on top of the soil and stays there so use liquid
it means it is composed of organic matter like manure. Or can be made from fish emulsions, like Neptune's Harvest.
KNP - Potassium Nitrogen and Phosphorous are the principle ingredients in some form or another. Ammonium Phosphate for example have both nitrogen and phosphorous. Pottasium Phosphate K and P etc....