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Old 03-14-2009, 07:47 PM
RigglePLC's Avatar
RigglePLC RigglePLC is online now
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Location: Grand Rapids MI
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calibration of spreader

Does fertilizer spread faster and flow quicker if the humidity is low? The flow of my Barricade product was great today. While spreading with my Permagreen Ultra, I think I had to reduce the control dial to a lower setting, just due to dry weather. I found I must apply 50 pounds in just over 3 minutes and 40 seconds. Irregular, but once I ran out only 10 seconds too soon.

Also--is there any difference in flow rate if the spreader is full, as compared to half, or a quarter full? I hope not; calibration would be a whole new ball game.
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Old 03-15-2009, 12:54 AM
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Think Green Think Green is offline
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Humidity affects the coatings on the herbicide combination products. It pulls the moisture from the air and makes the product behave differently. Products like 13/13/13 and urea will start to melt almost instantly inside a hot hopper in high humidity. If it is drier outside, the product will not clump or stick. High humidity will cause sticking and slower application. I will call this a common sense action with certain fertilizers being sulfur coated, plasticoated. Quick release nitrates will behave differently under excessive moisture conditions.

I applied 34/0/0 to my 2 acres the other day. It was 78 degrees with about 15% humidity. My hopper holds 100 lbs. The stuff was getting sticky inside the hopper as I was walking. The weight of the fertilizer, and while bumping around on ruts, made the material pack inside the hopper. I did apply less per acre than calculated for. After the 2 acres were done, I had 10 lbs left over...... The hopper was stickier than before....
Moisture affects paints.........?
Moisture affects sand........?
I will think a little harder and respond later..

Excellent topic Riggle.
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Old 03-15-2009, 01:14 AM
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Think Green Think Green is offline
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Needless to say Riggle, I underapplied fertilizer to my pasture.................
My spreader isn't adequate enough maybe....
I have had better results from those cheap ole' Scott's push models..??
Paid 200.00 for this model and the aperature gets clogged too easily.
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Old 03-15-2009, 09:02 AM
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grassman177 grassman177 is offline
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oh yeah, especially when spreading grub control. some brands are notorious for being sticky. we always have to trun our spreaders up a notch or two and clean them out several times per day. nothing else seems to affect the rate like that one. wehave found a cleaner products and dont have much problem anymore but always look for the problem to occur
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Old 03-15-2009, 10:15 AM
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Jason Rose Jason Rose is offline
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Yes, definately. I don't fertilizer full time, but I do enough, lol. I notice the difference between a humid day and dry days too. On humid days even 'clean' fertilizer cakes up on the spinner plate. Yesterday I went through 25 bags and there was barely anything on there at all, all day.
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