Equations for AI in combo products

Discussion in 'Pesticide & Herbicide Application' started by Shades of Green LService, Feb 19, 2007.

  1. Shades of Green LService

    Shades of Green LService LawnSite Bronze Member
    Posts: 1,011

    Whats the easiest equation for figuring out ai p/K in combo products??
     
  2. lilmarvin4064

    lilmarvin4064 LawnSite Senior Member
    Posts: 757

    no problem,

    let's take Dimension 0.10% 19-0-6 for example,

    The desired ai/A (active ingredient per Acre) for my area is 0.38 lbs. ai/A.

    To do equal, split apps, you need 2 rounds at 4.35#.

    app rate x Acre x concentration

    4.35 x 43.56 x .001 = 0.19 ai/A

    2 apps is 0.19 + 0.19 = 0.38

    Abbreviations

    ar = application rate
    A = Acre
    c = concentration of active ingredient in bag (0.21% = 0.0021)
    ai/A = desired active ingredient per Acre

    Formula....

    ar = (ai/A) / (A x c)


    example...
    for Dimension 0.21% 18-0-10

    ar = (0.38) / (43.56 x 0.0021) = 4.15 lbs.
     
  3. Shades of Green LService

    Shades of Green LService LawnSite Bronze Member
    Posts: 1,011

    thanks, looks good. bare with me for a minute if you will.I want to keep my records crystal this year, you understand. heres the product i'm trying to figure:
    16-0-28 .43% AI
    max ai per year per acre is 1lb at a rate of 5.34 lbs per /K
    how would i figure out the AI per thousand. What do you think?
     
  4. ampeg76

    ampeg76 LawnSite Senior Member
    Posts: 297

    pardon my hijack:)

    when doing split applications using dimension, what are the benefits?

    does this diminish the effects on the N-P-K side of things going with two half rate applications?

    thx
    mike
     
  5. Shades of Green LService

    Shades of Green LService LawnSite Bronze Member
    Posts: 1,011

    never mind, got it thanks.
     
  6. teeca

    teeca LawnSite Bronze Member
    Posts: 1,202

    i use liquid apps, so nothing is effected by way of N-P-K. also here in the north, the N-P-K in the spring isn't that big of a deal, the pre-m is. as far as split apps, the coverage is extened into the summer months, long after the effects of a single app is over (split apps realy help when you have a rainy summer, when the 1 app program leaches out)
     
  7. ampeg76

    ampeg76 LawnSite Senior Member
    Posts: 297

    thanks
    mike
     
  8. ATVracer

    ATVracer LawnSite Senior Member
    from Indiana
    Posts: 346

    Purdue's turfgrass site has a new link that came out yesterday with the formula. It is under turf tips.
     

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