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Likely calculations incorrect, not calibrated correctly or your 'passes' are too close.
The settings on those spreaders are ''not absolute" -merely a relative indication.
Also worth making sure the spinner on the shaft is 'working' correctly ....
Thanks, Gary for that! I need to do a calibration!
You need to calibrate.
What setting are you using, and what does the manual say? How wide are you assuming is the spread width? Are you moving over that distance between passes?
The manual may say 35g/sqm is setting X, but that may be for different granule sizes to what you're using - smaller ones go through more easily.
Don't panic though you'll soon get the hang of it. Have a look at this in case the manual has nothing on calibration.
https://www.agrigem.co.uk/agronomist/article/how-to-calibrate-a-fer...
Hi, Andrew thanks for that!
That one of the problems I have no instructions with it for the spreader as the company already build it! Grr
Thanks for the link that great help! :-)
I had one of those spreaders, I was working I Region of '20' but it also depends on granular size.
What fertiliser are you using?
Cool! Thanks, Oliver that great I try on that setting!
Its a lot like pesticide application - combination of walking speed, spreading width and amount dropping onto the spinner plate. Calibration is key and each fertiliser granule size will need its own calibration as they flow at different speeds...A lot of the broadcast spreaders are made for the US market so the figures on the rate selector are a guide for the user themselves not a g/m2 rate: Youtube video on calibration: https://youtu.be/nymJyZ8Hkfg
Those "drop spreaders" are awful things........................ if you're using too much fertilizer on each job, either walk faster or just reduce the aperture setting till you're using the correct amount for the size of lawn. ... then, just leave the aperture and always use that speed............ it really is so simple and with a little trial and error, you'll get it spot-on. As said, you can do a "calibration" but Ive not found it nessary as above works fine for me.
Many might disagree with my method, but I prefer to set the spreader to the lowest setting that allows for the size of granule to be spread, measure out the correct weight of fertiliser for the area and then go for it. Because the spreader is invariably spreading the minimum amount (nearly) possible this allows you to do multiple passes in different directions. The amount per sq.m might not be 100% uniform, but it's very close and you won't end up with overdosed or underdosed lines or patches.
Hi Sean
That sounds and good plan! Thanks for your help!
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