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Yellow Turf - Why?

Discussion in 'General Industry Discussions' started by Crist Clapper, Sep 17, 2011.

  1. Crist Clapper

    Crist Clapper LawnSite Member
    Posts: 77

    Two tests; One each of green and yellow grasses. This initiated the application/testing of iron, sulfur, and Solubor.
    Penn State recommendation: The only two testing parameters of concern are iron and boron. Iron will become deficient when the soil pH is too high. Acid injection lowers the soil pH and makes the iron more readily available for uptake by the turf. Another option which may be more of a temporary fix calls for an application of iron sulfate at a rate of 4 ounces per 100 gallons of water to the turf. This material needs to be washed off of the turf after application to prevent burning.

    Boron deficiency is easy to correct, but it can also be tied to soils which have an elevated pH. Symptoms of Boron deficiency in wheat are often expressed as a yellowing or chlorosis of the leaf tissues. The product Solubor can be applied to crops/turf displaying deficiency symptoms to correct the problem. Consider one application of Solubor to the turf to bring up Boron levels in the tissues. If you lower soil pH with the iron sulfate or through acid injection from the irrigation system you may also increase Boron uptake by the turf.

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    54.jpg

    PK12455A.jpg

    55.jpg
     
  2. TLS

    TLS LawnSite Fanatic
    Posts: 7,940

    Was this light green turf present LAST October?

    Was this light green turf present in July of this year?

    And when were the two pictures taken above?

    Get a close up of the green and light green blades for comparison.
     
  3. Crist Clapper

    Crist Clapper LawnSite Member
    Posts: 77

    The light turf has been present for many years. I have always been told pH was the culprit. Sulfuric acid in the injector, and sulfur pellets if needed... pH has tested from 8.2(spring) to 6.6 this summer; Around 7.1 now. Problem exists at all pH levels.

    FYI: Core-aeration in spring/fall - Thatched in spring

    Help???

    1st: Dark
    2nd: Light

    GrassDark.jpg

    GrassLight.jpg
     
  4. 32vld

    32vld LawnSite Gold Member
    Posts: 3,984


    How do you get rid of the annual or perennial rye or poa annua?
     
  5. ReddensLawnCare

    ReddensLawnCare LawnSite Bronze Member
    Posts: 1,652

    Sharpen your blades first off....and second..have you tried and fungicides..if nothing else for S&Gs
     
  6. ReddensLawnCare

    ReddensLawnCare LawnSite Bronze Member
    Posts: 1,652

    Do a test to see if you have any grubs as well
     
  7. TLS

    TLS LawnSite Fanatic
    Posts: 7,940

    Crist,

    Nothing wrong with your yard.

    You simply have two different species of grass.
     
  8. Crist Clapper

    Crist Clapper LawnSite Member
    Posts: 77

    Blades are good... The (wet) weather is not! :) Daconil and Manicure.

     
  9. Crist Clapper

    Crist Clapper LawnSite Member
    Posts: 77

    Done: Merit. :)

     
  10. Crist Clapper

    Crist Clapper LawnSite Member
    Posts: 77

    Interesting... What makes you think this? All information welcome! As for the two turf tests I posted from Penn State... Both the dark and light samples came back a Kentucky-Blue.

    Your thoughts?

    Thanks, Crist

     

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