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| I read where alot of people apply the 28 or 32 liquid nitrogen and I was wondering what the advantage was over regular granular nitrogen. I am thinking about applying some to my bermuda grass next year,I know of one man close to me that does and he likes it but it is a ways to transport it and I don't mine spraying it,if it is that much better. Thanks |
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Lapel, In | I assume you are talking about urea ? Urea is anhydrous ammomia that is dropped in a tall tower where it salts out. 28% or UAN is part urea. Nitrogen is pretty much nitrogen and needs lime to neutralize the effects of it with ammonia using the most lime( or calcium )in particular. 28 or 32 is much less likely to volotalize if the weather is hot and dry.Its best if you can get a rain on it soon after application without some form of tillage to cover it. This is particularly true with Urea. |
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| MSB is right, N is N, but the availability and loss potential are different between liquid and urea. Urea has to be converted to nitrate for the plants to take up. Liquid N is already half nitrate, so less susceptible to losses, by half anyway. The challenge with dry granular products is uniform spreading, most spinning disc spreaders can't acheive it so air spreaders should be used. |
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Seaforth, Ontario | Around here we use a quite a bit of 28% on winter wheat in April. You can use your own sprayer and I find it applies more evenly. As long as you don"t miss any you won't have any streaking. Some growers are afraid of burning the wheat if they use flood nozzles although I find if you apply before too much growth it doesn't burn. Even if it burns a bit I find the wheat stools better. I use floods and streamers depending on weather and stage of wheat. |
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Southeastern Washington | We don't use any of those products any more. We use melted down dry Urea 46-0-0 and water. Diluted down to a 22-0-0 liquid urea. Products weight comes in at 11.6 lbs per gallon. The reason for diluting with water is that the more concentrated the sooner it will salt out at warmer temperatures. For example at 22% it will not salt out until 32% Ferenhieght. 24% will salt out at 40 degrees ferenhieght. Then we inject into the grass stands using a spokewheel injector. Placeing the urea mix approximately 4" into the soil. With 60 degree soil temperatures the urea starts converting directly. We figure we don't loose any nitrogen applying in those soil temperatures and good soil moisture. |
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Kindersley Sk. | How do you mix the 46-0-0 and water? How long will it take for the Urea to dissolve? Any rocket science involved?
This could be something I might try if there gets to be a big price spread between UAN and Urea. |
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SW IA | I was going to ask this exact same question, but I also want to know if it will stay suspended or if it will have to be constantly agitated. Also can this be run through something like a John Blue pump? Was thinking of running it through a liquid applicator, like the one pictured below. (hope I can get it to attach)
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Montana | I do alot of "melting" urea to inject thru pivots. Most years alot cheaper than 28% or 32%. But would like to learn more about your spokewheel injector. Do you have any links to manufactors of these?
Edited by Montana Gary 11/16/2008 14:25
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Walnut Grove MN USA | I have done the mixing of urea and water. It worked mostly but if I do it again I would want very good agitation and very warm water. I just augered urea into a 3000 gallon water tank slowly with the water pump drawing off the bottom and dumping in the top. I don't remember for sure but I think I mixed around 6000 pounds of urea into 2000 gallons of water and applied the mix to spring wheat to increase protein, worked a little too good. 16+ protein. |
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Little River, TX | Tom,
The only difference is the cost per pound of nitrogen.
Have a neighbor who at one time was in Oklahoma Extension and he traveled that state surface applying liquid & dry nitrogen sources and measured the differences.
Short answer is, ergonomically there is no difference. Not if applied before a wet spell rather than the usual getting in a sweat to put out fertilizer after a good rain. Apply 32, Urea, or Ammonium Nitrate when the ground is dry and there just is no measurable production difference, in bermudagrass.
John says if you want to get urea valorization you need to do it in a green house where you can get and maintain the temperature and moisture conditions needed for Urea Valorization.
Ammonium Sulfate is another that some here mix with Urea for the sulfur. I like 21-0-0 for turf grasses, as I apply enough to make the ground look like it has snowed. Something you might not feel as being appropriate in your soil and climate.
Edited by Hay Wilson in TX 11/16/2008 15:14
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Southeastern Washington | UAP liquifyes it and sells it. I don't know the particulars on it. I just know we really like the product. |
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Southeastern Washington | Nice applicator. This is not a product you would want to store much over winter. We didn't have any problems with it seperating or coming out of suspension. But we had finished up before it started getting down in the low 30's, high 20's. We ran it thru all the same pumps that we were applying aqua with and it was nice because we could have UAP make us up any kind of blend we needed. You can mix your 10-34's and Thio-suls with it and put them in the ground with out worrying about double shooting or messing with the dry. |
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Southeastern Washington | Yes. Just google, Brian Jones Helix Oregon or Spokewheel injectors and you should get some hits to go look at. |
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Southeastern Washington | I know heat is a big part of the process. |
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SW IA | Thanks, but that was a general pic I pulled to use as an example. We hope to get one like this sometime soon. Can I ask how much less expensive this is compared to using 28% or 32%? Thanks, Eric |
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Southeastern Washington | Last year Liquified Urea to the grower was running about $0.70/lb of Nitrogen
Solution 32 to the grower was running around $0.77/lb of Nitrogen
Not sure on the 28-0-0. I'll have to get back to you on that one. |
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advantage of 28 or 32 over granular fertilizer
