Soil test reults...help me out

Discussion in 'Pesticide & Herbicide Application' started by stryper, Apr 8, 2005.

  1. stryper

    stryper LawnSite Member
    from IL
    Posts: 132

    Rather than just experiment with different products blindly, as was obviously implied by my "downside to iron" thread, I'm wanting to take at least a somewhat intelligent approach to this fertilizer thing. So I was just looking at the results of a soil test I had done by a local ag lab last year, and they they gave me the following:

    Soil Test Results
    pH: 7.2
    Phosphorus (lbs/acre): 39
    Potassium (lbs/acre): 246

    Recommendations for Turfs and Lawns
    Nitrogen: 4 lbs/1000 sq. ft
    Phosphate: 2 lbs/1000 sq. ft
    Potash: 1 lbs/1000 sq. ft
    (no recommendations about the pH)

    Now, most of the Lesco products I used last year were pretty low in P--21-0-12(weed & feed), 24-5-11 (Merit), 24-0-11, 34-3-11. And I do recycle my clippings. So I think my N#s are probably okay now, as I am trying to be regularly on top of things, but it seems a 2 to 1 ratio of P and K are/were needed and never really addressed. So would a product like Lesco 18-24-12 be more appropriate than some of the other products I've mentioned in the previous thread? Reading the label, it says that at the recommended rate I would get 1 lb/1000 sq.ft., which is only half what the lab suggests, but I would think this is at least a step in the right direction. (I couldn't find anything else with that sort of ratio that's locally available.)

    Thanks again.

    http://www.lesco.com/?PageID=27&ItemNumber=016420
     
  2. kickin sum grass

    kickin sum grass LawnSite Senior Member
    Posts: 628

    if my math is right appling the 18-24-12 at 4.1 lbs/1000 will give you just under .75 lb of N - 1 lb of P and .5 lbs K.
    I would do this product a couple times this year.
     
  3. stryper

    stryper LawnSite Member
    from IL
    Posts: 132

    Does everyone else concur?
     
  4. Garth

    Garth LawnSite Senior Member
    Posts: 382

    Take into account that 18-24-12 is a percentage ratio and not active ingredient amount i.e. the pounds of product applied will not give you the pounds of "active ingredient" needed.
     

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