fert. calculation tool

Discussion in 'Pesticide & Herbicide Application' started by jake65, Dec 27, 2005.

  1. jake65

    jake65 LawnSite Member
    Posts: 75

    Is there such a tool that will calculate or convert nitrogen, phos, and potas. and the amounts needed per sq. ft given the sq ft desired??

    Thanks

    Jake
     
  2. ThreeWide

    ThreeWide LawnSite Bronze Member
    Posts: 1,116

  3. jake65

    jake65 LawnSite Member
    Posts: 75

  4. Russ

    Russ LawnSite Senior Member
    Posts: 539

  5. YardPro

    YardPro LawnSite Gold Member
    Posts: 3,563

    yea, it's called a brain..... lol sorry couldn't resist...
     
  6. Landscape25

    Landscape25 LawnSite Member
    from Florida
    Posts: 199

    This is for 1 lb. N for 1,000/ sq. ft. in case you don't have access to a computer.

    Eg. 17-2-11 50lb. bag

    Divide 100 by 17, because 17 is based on a hundred pounds. This gives you 5.88 lb. This will be the total amount of fert. you need per 1,000 sq. ft.

    The whole bag covers 8,500 sq. ft. for N because it is a 50 lb. bag.
    8,500 divided by 1,000 = 8.5
    8.5 x 5.882 lb. = 50 lb.

    If you want .5 lb N per 1,000 sq. ft. use half the amount.



    Yeah, the Google method is definitely easier, but not always practical.
     
  7. TforTexas

    TforTexas LawnSite Senior Member
    Posts: 260

    Just multiply the weight of the bag by the percetage of N, P or K posted on the analysis. A 50 pound bag of 20-10-10 has 10 punds of Nitrogen and thus will do 10,000 Sq ft @ 1lb of N per 1,000
     

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