Ferrous Ammonium Sulfate | Liquid Iron for Lawns

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Harts
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Re: Ferrous Ammonium Sulfate | Liquid Iron for Lawns

Post by Harts » Fri Aug 30, 2019 12:27 pm

@MMoore I would do them one at a time.

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Re: Ferrous Ammonium Sulfate | Liquid Iron for Lawns

Post by canadian lawn » Sat Aug 31, 2019 1:32 am

I’m a bit confused, the urea is dissolved and mixed with the FAS and PGR or applied as a granular?

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Re: Ferrous Ammonium Sulfate | Liquid Iron for Lawns

Post by Harts » Sat Aug 31, 2019 5:52 am

You can apply as a foliar or granular. It can be spoon fed and mixed with FAS and PGR or applied on its own.

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Re: Ferrous Ammonium Sulfate | Liquid Iron for Lawns

Post by Pete1313 » Sat Aug 31, 2019 11:10 am

@Harts, I see you mentioned earlier you use 2oz/M FS and 1.7oz/M AS. How much urea are you putting in the tank as well?
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Re: Ferrous Ammonium Sulfate | Liquid Iron for Lawns

Post by Harts » Sat Aug 31, 2019 11:30 am

@Pete1313 my last two apps of urea have been granular at 0.5lb N. I was unsure of how much carrier to use to spray that much N with pgr and fas.

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Re: Ferrous Ammonium Sulfate | Liquid Iron for Lawns

Post by Pete1313 » Sat Aug 31, 2019 11:38 am

@Harts, gotcha. That would be too much N to mix with the PGR and FAS for foliar. I'm due for another PGR app tomorrow and am thinking about putting some AS into the mix along with the FS, and urea.
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Re: Ferrous Ammonium Sulfate | Liquid Iron for Lawns

Post by Harts » Sat Aug 31, 2019 12:02 pm

@Pete1313 how much urea are you thinking? 0.2 N?

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Re: Ferrous Ammonium Sulfate | Liquid Iron for Lawns

Post by davegravy » Sat Aug 31, 2019 5:10 pm

I have FS and Urea but no AS. If I use dissolved granular urea instead of AS but at a reduced amount so that the total amount of N is the same, will I get the same boosting effect? Or is there something special about AS that means you can't substitute like this?

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Re: Ferrous Ammonium Sulfate | Liquid Iron for Lawns

Post by Pete1313 » Sat Aug 31, 2019 6:04 pm

Harts wrote:
Sat Aug 31, 2019 12:02 pm
Pete1313 how much urea are you thinking? 0.2 N?
I've done .2 lbs/M of N from urea in .9 gal/M carrier. That was only adding FS though and no AS.
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Re: Ferrous Ammonium Sulfate | Liquid Iron for Lawns

Post by Harts » Sat Aug 31, 2019 6:08 pm

@davegravy that's beyond my expertise. I don't want to give you false information.

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Re: Ferrous Ammonium Sulfate | Liquid Iron for Lawns

Post by Kaba » Sat Aug 31, 2019 6:21 pm

davegravy wrote:
Sat Aug 31, 2019 5:10 pm
I have FS and Urea but no AS. If I use dissolved granular urea instead of AS but at a reduced amount so that the total amount of N is the same, will I get the same boosting effect? Or is there something special about AS that means you can't substitute like this?
7-0-0 GreeneEffect uses Urea. I think @g-man spoke about AMS vs Urea in this thread somewhere a few months back (or maybe I am imagining), something along the lines AMS absorbs better but Urea still works. I tried searching for the information that I read but couldn't find it.

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Re: Ferrous Ammonium Sulfate | Liquid Iron for Lawns

Post by g-man » Sat Aug 31, 2019 8:07 pm

I think ferromac also uses urea. You can also just do FS.

But there is something that we forget to discuss, the carrier. My water source is very hard (~24 grains). I also don't know all the additives they add thru the year. Calcium in the water will affect the FS. By adding AMS, it helps reduce this effect. AMS also brings something else to the party, sulfur (not elemental sulfur). Sulfur is also used in making chlorophyll. Chlrophyll is what makes the plant green. So FAS brings iron + sulfur + nitrogen (growth).

This year I switched to using soft water in my tank mixes.

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Re: Ferrous Ammonium Sulfate | Liquid Iron for Lawns

Post by g-man » Tue Sep 10, 2019 9:31 am

Some good read this morning in regards to iron via soil and foliar.

https://www.gcmonline.com/research/news ... solubility




Study behind paywall: https://dl.sciencesocieties.org/publica ... 111/3/1498

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Re: Ferrous Ammonium Sulfate | Liquid Iron for Lawns

Post by davegravy » Tue Sep 10, 2019 12:01 pm

So in short non-chelated (FS, for example) should be applied foliarly with adjuvant and left on the leaf for a while.

Otherwise use chelated, and apply it however you want.

Is that a good summary?

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Re: Ferrous Ammonium Sulfate | Liquid Iron for Lawns

Post by g-man » Tue Sep 10, 2019 1:29 pm

Not really. For soil, the pH of the soil matters. Foliar always works.

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Re: Ferrous Ammonium Sulfate | Liquid Iron for Lawns

Post by Drewmey » Tue Sep 10, 2019 2:42 pm

One question I have always had is whether it is possible for iron to oxidize during mixing and in the act of spraying? I would imagine some. If so, is the amount of loss meaningful? I have been looking into buying citric acid in a bigger quantity to try to help alleviate this problem, but part of me thinks I should just continue to experiment with AS and adding more iron instead of attempting to chelate it since the FS is actually a good bit cheaper per oz than CA for me. I can get 50lbs of FS for $27 locally.
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Re: Ferrous Ammonium Sulfate | Liquid Iron for Lawns

Post by Grasshopper » Fri Sep 13, 2019 6:31 am

Quick question...

Sprayed FAS for the first time yesterday evening.
Will it be ok to leave the FAS on the leaves for almost 24 hours and not water it in myself but wait for the rain forecasted in the evening?

Temperatures have been around 50f overnight and will be a high of 70f today.
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Re: Ferrous Ammonium Sulfate | Liquid Iron for Lawns

Post by Harts » Fri Sep 13, 2019 6:52 am

@Grasshopper you do not need to water it in with the cooler temps.

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Re: Ferrous Ammonium Sulfate | Liquid Iron for Lawns

Post by MMoore » Fri Sep 13, 2019 7:24 am

and you can put it on immediately after a cut, yeah?

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Re: Ferrous Ammonium Sulfate | Liquid Iron for Lawns

Post by MMoore » Fri Sep 13, 2019 7:25 am

I woke up early to cut my lawn so I could spray FAS tonight but my daughter woke up with me and that was the end of that.

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