Question for those using liquid

Discussion in 'Fertilizer Application' started by Fubba, Jun 6, 2014.

  1. Fubba

    Fubba LawnSite Senior Member
    Posts: 356

    Is the AMS absorbed solely through the foliage, systemically, or both?
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  2. greendoctor

    greendoctor LawnSite Fanatic
    Posts: 9,122

    Centipede and St Augustine is very sensitive to concentrated fertilizer solutions. On those grasses, here is what I want. Irrigation right before application. Application of 1/2 lb N to be done in 2+ gallons unless watering in is done immediately.
     
  3. Fubba

    Fubba LawnSite Senior Member
    Posts: 356

    How do you handle lawns without irrigation?
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  4. RigglePLC

    RigglePLC LawnSite Fanatic
    Posts: 12,346

    Retired now. I was using a sprayer with a 6 gpm pump--Hypro GR232 or maybe 252. I used mostly urea which is a bit safer than Ammonium sulfate, I think.
    I used 3/4 pound nitrogen per thousand, above 80 degrees I used a half pound. Above 85 a quarter pound--plus about one-quarter as much potash. Applied about 2.6 gals per thousand sqft.
     
  5. greendoctor

    greendoctor LawnSite Fanatic
    Posts: 9,122

    Fertilizer rate goes down, water volume goes way up. As in no more than 5 lbs of dissolved material per 10 gallons.
     
  6. FdLLawnMan

    FdLLawnMan LawnSite Bronze Member
    Posts: 1,183

    The plant can only uptake .1 lbs of nitrogen through the foliar process. Everything elapse is taken up via the roots. If I am wrong on this someone please correct me. AMS had a higher salt content per nutrient value vs urea. I use AMS as an addendum with my UFLEXX and UMAXX because I have soils that are on the high end of the ph scale. I do not use it in the summer when it is hot. I then use a combination of Urea Triazone and my U fertilizers. If you don't have irrigation you need to dilute the fertilizer and apply less.
     
  7. lilmarvin4064

    lilmarvin4064 LawnSite Senior Member
    Posts: 757

    I assume you mean "salt index" or "osmolality index" and not "salt content" as it's unlikely AMS or other N sources would contain any negligible amounts of sodium chloride or other chlorides.
     
  8. FdLLawnMan

    FdLLawnMan LawnSite Bronze Member
    Posts: 1,183

    You are correct, wrong wording on my part.
     

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