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Old 04-11-2013, 11:46 PM
mr.lawn works mr.lawn works is offline
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Thoughts and Tips on Dissolving 46-0-0 Urea

I Have 4- 50lb Bags of 46-0-0 urea left from last fall thought I'd try dissolving it an spraying it as a liquid on my shop an home lawn to see what the results would be! Heres my questions the tank that will be holding this product is a 550 gal tank pulling from bottom of tank 1- what's the best way to dissolve and mix? 2-what is the proper water to 46-0-0 urea ratio? 3- after being dissolved how much aggitation will it need, to be before mixed with water and herbicide? 4- any other thoughts or ideas of products to dissolve? my thoughts where potash, and possibly mixing liquid iron in there as well! THOUGHTS IDEAS Thanks
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Old 04-12-2013, 04:15 AM
greendoctor greendoctor is offline
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For urea applied to a non irrigated lawn, I like 10 or more gallons of water per pound of urea. You can add soluble iron at label rates, up to 1/2 pound of potash and your common herbicides that permit mixing with liquid fertilizers. Sprayed urea greens grass up fast and fades in 21-30 days. It is not something that can be expected to last all season and it should not be double dosed in hopes of getting more life out of it. It should be applied lightly and often. What kind of grass is this going on? Cool season grasses should not be getting a lot of nitrogen in the summer. The time to feed is in the fall.
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Old 04-12-2013, 10:36 AM
mr.lawn works mr.lawn works is offline
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Quote:
Originally Posted by greendoctor View Post
For urea applied to a non irrigated lawn, I like 10 or more gallons of water per pound of urea. You can add soluble iron at label rates, up to 1/2 pound of potash and your common herbicides that permit mixing with liquid fertilizers. Sprayed urea greens grass up fast and fades in 21-30 days. It is not something that can be expected to last all season and it should not be double dosed in hopes of getting more life out of it. It should be applied lightly and often. What kind of grass is this going on? Cool season grasses should not be getting a lot of nitrogen in the summer. The time to feed is in the fall.
This is going on cool season grasses!
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Old 06-30-2013, 12:11 PM
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Ric Ric is offline
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Quote:
Originally Posted by greendoctor View Post
For urea applied to a non irrigated lawn, I like 10 or more gallons of water per pound of urea. You can add soluble iron at label rates, up to 1/2 pound of potash and your common herbicides that permit mixing with liquid fertilizers. Sprayed urea greens grass up fast and fades in 21-30 days. It is not something that can be expected to last all season and it should not be double dosed in hopes of getting more life out of it. It should be applied lightly and often. What kind of grass is this going on? Cool season grasses should not be getting a lot of nitrogen in the summer. The time to feed is in the fall.
I agree with Green Doctor on using a high volume of carrier when applying urea fertilizer. Because all my yards are irrigated I do cut my rate to 5 gallon per thousands. The more carrier the more for giving a spray is. You get no stripping etc with higher volumes.

Recently trying to force grow I mixed 50 LB of 46-0-0 urea in a 50 gallon skid I have on a trailer for mixing special jobs. At 3 gallon per thousand I sprayed a 7 K common Bermuda lawn in the rain to try and Kick it. That was 1.5 lbs of N per thousand and a lot of rain. The leave tips turned brown giving a brown hue to the lawn until it was mowed. Now the common Bermuda needs mowed twice a week, but it is sending out runners and filling in nicely. BTW This application was in addition to my standard Fert Program. BTW I also mixed in 0.10 oz per thousand of Roundup as a Growth Regulator to get more lateral growth.

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Old 04-12-2013, 04:48 AM
Smallaxe Smallaxe is offline
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So you're going to dissolve the slow-release prills to have all of the urea in solution right now??? It would be interestting to see how quickly that concentration(46%) will volatize from the tank... the greater the smell ,,, the more that's volatizing... maybe none...
Let us know the outcome of the experiment... sounds like you're going for quick greenup too,,, but greendoctor was right about not fertilizing too early in the Spring...
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Old 04-12-2013, 08:20 AM
HobieDude HobieDude is offline
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At what rate will you be applying this Nitrogen? Are you going to water it in? In my experience with warm season grasses it doesn't take much to cause significant burning if left on the leaves.
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Old 04-12-2013, 10:39 AM
mr.lawn works mr.lawn works is offline
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Originally Posted by HobieDude View Post
At what rate will you be applying this Nitrogen? Are you going to water it in? In my experience with warm season grasses it doesn't take much to cause significant burning if left on the leaves.
My sprayer is set up to spray 1.5gal/1000 sq. ft. this will be applied to cool season turf also...
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Old 04-12-2013, 10:57 AM
HobieDude HobieDude is offline
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If you use Greendoctors dillution rate of 10 gallons water to 1 lb urea that's only .075lb N per 1,000sq ft (at 1.5 gal/1000 actual spray) which shouldn't cause any burn.
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Old 04-12-2013, 11:29 AM
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I used to use about 50 pounds of urea per 80 gallons of water--however I sprayed at 2.6 gallons of solution per 1000 sqft. In warm weather high concentrations of urea can burn the grass.
Add the urea, add the water and then stir with a canoe paddle. (Or a shovel). Do not start the pump as the filter will be immediately clogged. Best to wait overnight to be sure the urea is completly dissolved. Be ready to clean the filter if needed. Once dissoved, add the herbicide and you need only minor agitation to keep the herbicide in suspension. Iron can stain--could end up with a brown tank.
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Old 04-12-2013, 12:10 PM
mr.lawn works mr.lawn works is offline
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My next question would be is there anyway to make it more of a slow release??? Add some Uflexx???
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