My first time spraying N

Cool season grasses like Kentucky Bluegrass, Fescue & Rye
davegravy
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My first time spraying N

Post by davegravy » Mon Aug 12, 2019 7:37 pm

Actually my first time spraying anything.

I picked up a the Chapin 24v backpack sprayer and a bag of urea.

I'm planning to do 1 lb/k of urea (0.5lb/k of N) every 2 weeks. Do I have this right:

1) Spray my full yard with water and figure out at my pace of walking how many gallons it takes
2)My lawn is 5000sqft so I need to disolve 5lbs urea in whatever volume of water I determine above.
3)Spray it and let it sit for 4hrs
4)Water it in

?

I did some practice on the driveway with water and I found the nozzle left a pretty strong line at the edges of the spray pattern. Would it be worth splitting the 5lbs across 2 applications so I can minimize this and have more even distribution? Or walking twice as quickly so I can make a 2nd pass? Is colorant recommended, even if just for my first few times?

Thanks!
Last edited by davegravy on Mon Aug 12, 2019 7:37 pm, edited 1 time in total.

Babameca
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Re: My first time spraying N

Post by Babameca » Mon Aug 12, 2019 8:03 pm

davegravy wrote:
Mon Aug 12, 2019 7:37 pm
Actually my first time spraying anything.

I picked up a the Chapin 24v backpack sprayer and a bag of urea.

I'm planning to do 1 lb/k of urea (0.5lb/k of N) every 2 weeks. Do I have this right:

1) Spray my full yard with water and figure out at my pace of walking how many gallons it takes
2)My lawn is 5000sqft so I need to disolve 5lbs urea in whatever volume of water I determine above.
3)Spray it and let it sit for 4hrs
4)Water it in

?

I did some practice on the driveway with water and I found the nozzle left a pretty strong line at the edges of the spray pattern. Would it be worth splitting the 5lbs across 2 applications so I can minimize this and have more even distribution? Or walking twice as quickly so I can make a 2nd pass? Is colorant recommended, even if just for my first few times?

Thanks!
Why did you decide you want to spray? at the rate you posted foliar app is a 'killer'!
You can spreader apply 0.5 every 2 weeks and water in, if you decided to do the N blitz.
If not, where are you at with your lawn?
The more info we have, the more precise/personalized answer you will get.
For you Chapin, see the tread for teejet nozzles. They must fit (not the quick connect ones)
M

davegravy
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Re: My first time spraying N

Post by davegravy » Mon Aug 12, 2019 8:21 pm

@gergelybg thanks for the quick reply.

I'd like to spray because I have a new toy and I need to use it :P Just kidding. I have a spreader but it's not very good and I have a hard time controlling it. The rate of spread increases dramatically as I go from full hopper to empty hopper. I've used it for grass seed and hate it.

Not sure what you mean "where are you at with your lawn?" My lawn log is here: viewtopic.php?f=9&t=11955 and yeah I was planning on doing the blitz plus applying prodiamine.

Thanks I'll look into those nozzles.
Last edited by davegravy on Mon Aug 12, 2019 8:23 pm, edited 2 times in total.

Babameca
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Re: My first time spraying N

Post by Babameca » Mon Aug 12, 2019 8:33 pm

@davegravy 3rd attempt to post...
I have read your journal. It is hard to keep up. Just finished seed down and 2 long days.
I very well understand the toy joy :). I bought a Ryobi 4gal from US. Can't be happier. Works very well with my 'organic' lawn.
Foliar app of N is very suitable to sandy soil (all flushes faster, like in golf courses) and when you spoon feed (summer for example). As far as I undertand N blitz is all about a 'massive' amount of N in 2 months. Your can not take it foliar... Not urea for sure. Buy a cheap Scott's spreader for 40CAD and go. It will look a funny small amount of granules but it is 46% N.
Get good nozzles and practice. Teejet are awesome. I use it for my organic Kelp, Humic and micros :). The all organic guy now.

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g-man
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Re: My first time spraying N

Post by g-man » Mon Aug 12, 2019 8:37 pm

A teejet nozzle will give you a better pattern, but you plan to water this in, so not as critical for this application.

I would not let it sit for 4hrs at that rates with the edge pattern your nozzle is giving you. Just water it in immediately. You will like the results.

You question around splitting the quantity is a good one. If you split the qty of urea but keep the same qty of water, then yes do a second pass in a different direction. This is actually a better approach since the output is not as concentrated.

Overall, this will give you more experience spraying and getting used to your system. For plant grow regulators or fungicide you will want more even distribution. The teejet nozzles really make a difference. I use the AIXR11004 with a battery Chapin (like yours). It gives me 1g/ksqft at my walking speed. Dyes help the first few times. Using the mower stripe pattern also helps (~20in wide matches the spray pattern).

You got this.

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Re: My first time spraying N

Post by g-man » Mon Aug 12, 2019 8:45 pm

This video is how I learned to do this. He has the proper PPE and good tips. I don't do the sky pole marking, but maybe I should because I have lost track of my stripes in the past.


Babameca
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Re: My first time spraying N

Post by Babameca » Mon Aug 12, 2019 8:46 pm

@g-man mower stripes are a perfect GPS. Use them, but forgot to include that trick. Thanks for chiming in.
M

davegravy
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Re: My first time spraying N

Post by davegravy » Mon Aug 12, 2019 9:31 pm

Thanks all! Can't wait to try this

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Re: My first time spraying N

Post by Dkrem » Tue Aug 13, 2019 7:31 am

Make sure to flush your sprayer and wetted parts well after running the urea, it will eat things up pretty quick.

davegravy
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Re: My first time spraying N

Post by davegravy » Tue Aug 13, 2019 9:58 am

Dkrem wrote:
Tue Aug 13, 2019 7:31 am
Make sure to flush your sprayer and wetted parts well after running the urea, it will eat things up pretty quick.
Good to know, thanks!

Are there specific materials it tends to react with? Like plastic? Fertilizer in general I thought I read tends to stain concrete.

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Dkrem
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Re: My first time spraying N

Post by Dkrem » Tue Aug 13, 2019 10:10 am

davegravy wrote:
Tue Aug 13, 2019 9:58 am
Are there specific materials it tends to react with? Like plastic? Fertilizer in general I thought I read tends to stain concrete.
Salt eats metal, plastic is fine.

davegravy
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Re: My first time spraying N

Post by davegravy » Tue Aug 13, 2019 10:50 am

Dkrem wrote:
Tue Aug 13, 2019 10:10 am
davegravy wrote:
Tue Aug 13, 2019 9:58 am
Are there specific materials it tends to react with? Like plastic? Fertilizer in general I thought I read tends to stain concrete.
Salt eats metal, plastic is fine.
Oh ok it's just the salt component and metal corrosion then. I thought maybe there was another chemical reaction going on with the nitrogen or something I had to worry about.

davegravy
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Re: My first time spraying N

Post by davegravy » Tue Aug 13, 2019 1:11 pm

There's no issue with me putting prodiamine in the tank with the urea, right?

viewtopic.php?f=9&t=4695&p=89972&hilit=grams#p89972
Sinclair wrote:
Thu Aug 09, 2018 6:23 pm

Is it Alligare 65WDG? If so you dissolve a tiny amount in water as g-man said.

You need a very accurate digital scale with decimal grams precision.
I have a scale that only has grams precision. Is this really going to be a problem?

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ryeguy
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Re: My first time spraying N

Post by ryeguy » Tue Aug 13, 2019 3:32 pm

davegravy wrote:
Tue Aug 13, 2019 1:11 pm
There's no issue with me putting prodiamine in the tank with the urea, right?

viewtopic.php?f=9&t=4695&p=89972&hilit=grams#p89972
Sinclair wrote:
Thu Aug 09, 2018 6:23 pm

Is it Alligare 65WDG? If so you dissolve a tiny amount in water as g-man said.

You need a very accurate digital scale with decimal grams precision.
I have a scale that only has grams precision. Is this really going to be a problem?
That product specifies a dose of 0.5-1.5lbs per acre which translates to 5.2g to 15.6g per 1k. Those amounts aren't small enough to be worried about sub-gram precision IMO.

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Re: My first time spraying N

Post by davegravy » Wed Aug 14, 2019 3:37 pm

It's done, watering in now. Is 0.5in of water enough? Can I get away with less (takes a while to water the whole lawn manually)

Image

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Last edited by davegravy on Wed Aug 14, 2019 3:41 pm, edited 1 time in total.

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Harts
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Re: My first time spraying N

Post by Harts » Wed Aug 14, 2019 5:53 pm

How many lb of N did you apply and in how much water?

davegravy
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Re: My first time spraying N

Post by davegravy » Wed Aug 14, 2019 9:09 pm

Harts wrote:
Wed Aug 14, 2019 5:53 pm
How many lb of N did you apply and in how much water?
0.5lbs N in about 7.5gal

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Re: My first time spraying N

Post by g-man » Wed Aug 14, 2019 9:13 pm

0.5lb of N for the entire lawn or per ksqft? 7.5g for the entire lawn?

Yes, 0.5in is more than enough. The idea is to wash the fertilizer off the leaves.

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Re: My first time spraying N

Post by davegravy » Wed Aug 14, 2019 9:38 pm

Oops sorry 0.5 N per sqft, 3400sqft.

7.5gal for the whole lawn.

All the colourant was washed off the leaves so I have to assume the urea was too. I guess I'll find out in the next couple days?
Last edited by davegravy on Wed Aug 14, 2019 9:39 pm, edited 1 time in total.

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Re: My first time spraying N

Post by Harts » Wed Aug 14, 2019 10:04 pm

So approx 2 gallons per ksqft....

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