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NW illinois | Was wondering exactly how much nitrogen is in a unit. It should depend on what nitrogen source you are using? I did some calculations based off of 34% UAN. I figured that it would take 3.9 lbs of product to get 1 lb. of nitrogen thus having 2.9 lbs. of whatever else is in the mixture? I am always talking in units of nitrogen with growers, so I think I should know what I am talking about. Thanks. |
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Rocky Comfort, MO | When you say units, to me that is Actual N. One unit of N is one unit of actual N. If someone says they are broadcasting with a spreader set on 300 lbs/acre and they are spreading Ammonium Nitrate they are actually putting down 102 actual units of Nitrogen. As far is solution, 32% Uan weighs 11.06 lbs per gallon. You get 3.54 Units of Actual N out of that one gallon that is 11.06 pounds. So you actually are getting .32 lbs of N per pound of the solution. As far as sources, Ammonium Nitrate is 34 Units of N per 100 pounds of dry product. So one pound of granular dry product yields you .34 lbs of Actual N. Is this what you are asking?
Edit: To get one unit of N out of ammonium nitrate you would have to put down 2.94 pounds of granular product
To get one unit of N out of 32% solution you would have to put down 3.125 pounds of product or .2825 gallons
Edited by RBT Farms 7/7/2011 12:42
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NW illinois | sorry, I accidentally put 3.9 lbs of ammonium nitrate instead of 2.9 which you stated in your comment. but what I really wanted to know i guess is how much product does it takes to get 1 pound of N. I did the math just the same as you did for ammonium nitrate. I didn't really know that when you are talking units you mean actual N. I guess I knew that it just never registered in my brain. So if you were applying anhydrous (82% N) you would have to put down 1.219 lbs. of product to get 1 unit of N |
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Downtown Shell Knob MO Come Visit! | Correct
You can do the math with NH3 and NH4NO3 and determine why the weight of the actual N is what it is, but I don't don't want to do moles today, I passed chemistry with a 20 dollar bill inside the final. :/
Edited by mcupps 7/7/2011 13:08
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Northeast Louisiana | The way we use that term "here" is 1 Unit = 1 lb actual N. Example: 100 lbs dry Urea = 46 units actual N.
To grow a corn crop "here" we use about 200 units of N. The amount of actual product required to obtain this amount will depend on the form used. |
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SE IL | Here is one definition. Scroll down.
http://www.fertilizer101.org/dictionary/?dictionary=4 |
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| Have never heard it used that way. To me and everyone I've dealt with who uses the term 'unit,' we mean 1 lb of actual N, 1 lb of P2O5, etc. |
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Palestine, IL 62451 | I was always told to divide what you need by what you got. I need 56# phosphate and am using 18-46-0 then I need to apply 122# of 18-46-0 to get the 56# of p that I want. |
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How much nitrogen is in one unit?
