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Newbie Question.

Discussion in 'Pesticide & Herbicide Application' started by JShe8918, Apr 20, 2008.

  1. JShe8918

    JShe8918 LawnSite Senior Member
    Messages: 946

    I have a question. Yesterday i had to fertilize a home that's sq ft was 36,982. Please help me. I used lesco 22-0-11 with atrazine. Okay so the bag said that my spkyker spreader should be set to 4-4.25 and to walk at 3 mph. Well i did this after i figured how many lbs. i needed to put down total. I Calculated it up to be . 36,982/1000= 36.982 Then.... it recomends 3.7- 4.7 pounds per 1000 sq ft. So that means. 36.982 * 3.7= 137 lbs. Then a 30 percent margin for error. 137*.30= 41.11 137-41.11= 96lbs total. I did not even put down 60 maybe 50 at the MOST. What do you THINK i did wrong. Thanks...
  2. olive123

    olive123 LawnSite Senior Member
    Messages: 500

    are you sure the turf area was 36k or was the entire property 36k.
  3. JShe8918

    JShe8918 LawnSite Senior Member
    Messages: 946

    turf area. I measured into sections. and then added them together... I even measured twice. I can upload a scale drawing if you like...
  4. humble1

    humble1 LawnSite Silver Member
    from MA
    Messages: 2,519

    do a search on spreader overlap.
    I bet you didnt hit your tire track, but only the outside edge of what you were putting down.
  5. RigglePLC

    RigglePLC LawnSite Fanatic
    Messages: 13,720

    Don't take those rate tables on fert bags seriously. Some of them are just copied from some other fert company. Some are just super old--not changed since the 70's.

    Professionals calibrate their equipment before doing their customer's lawns. of course it gets tricky when you have to switch to all kinds of different products.
    Buy some scales--and a steel tape. Use a stop watch to determine your actual speed. Weigh out enough to cover 2000 sqft. Practice a few times on your own lawn. Measure your square feet and swath width with the tape.
  6. Hissing Cobra

    Hissing Cobra LawnSite Senior Member
    Messages: 705

    Well, if it's 37,000 sq. feet and you're applying it at a rate of 4.5 lbs./1,000 sq. feet (equals 1 lb. of Nitrogen/1,000 sq. ft), you would need 166.5 lbs. of product - or a little more than 3 bags. That being said, there are multiple ways in which you can come up short. Walking too fast or spacing too far can have negative effects on coverage. Also, a clogged spreader or uncalibrated spreader can also affect coverage.

    If you used only 50 or 60 lbs, you definitely did not apply enough fertilizer! I recommend that you should go back and refertilize the lawn and plan on using about 100 lbs for the entire lawn. Also, proper spreading should be done by following the "tire to tire" rule. Basically, you make your first pass and when you turn around for your next parallel pass, you look for your tire marks. When beginning the next pass, observe the fertilizer as it shoots to the sides. You want to make sure that the pellets are hitting the tire mark that's CLOSEST to you from your previous pass (not the tire mark that's farthest from you).

    Good luck and let us know how you're making out.
  7. vegomatic40

    vegomatic40 LawnSite Senior Member
    from 6
    Messages: 406

    I'm with Humble1 on this one. Overlap is the likely cause of under-application. You may even see streaks in this lawn in the coming days/weeks. Wait until you see the results then re-apply at a lower rate in the opposite direction. Do it in the early morning with dew on the ground if you have difficulty seeing your tracks.
  8. JShe8918

    JShe8918 LawnSite Senior Member
    Messages: 946

    Thank you guys this helps me see some of the mistakes i was making. I was not properly prepared for fertilizing. I am also looking for some literature on fertilizing if any one knows of any please let me know. Thanks. One i only let edge touch edge not tire mark to tire mark... Then not properly calibrating my spreader.

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