[compost_tea] Re: Best Environmental Technologies?

From: steved3602002 <steved_at_ipa.net>
Date: Wed, 06 Apr 2011 14:34:32 -0000

Stephen -

I guess that's the South African / international
units method of sprayer calibration.

In the American units systems we have a similar
approach called the 1/128th method. You measure the
distance between nozzels and use a chart to see how
how many feet you have to travel -- called the course
length. You drive across the course length and
record how many seconds it it took. Then you catch
liquid coming out of a nozzle for the same amount
of time, for exmaple 30 second. Since there are 128
fl oz per gallon, the ounces delivered per nozzle
in the time it takes to drive across the course length
is equal to the number of gallons per acre. Then you
divide that into your tank volume to see how many acres
you can treat per tank load.

Steve Diver


"Stephen Steyn" <ssteyn_at_...> wrote:
>
>
> Now about sprayers. I long ago discarded the complicated formulas for
> calibrating sprayers. In my opinion there is only one way to do it:
>
> If your sprayer nozzles are 500mm apart, then over 100m each nozzle
> effectively covers 50m square. (.5x100 square metres) Now 50m square is
> 1/200 of a hectare (50/10 000=1/200). So, if you time your rig over 100=
m,
> and take the pressure or pto rpm, then each nozzle will give 200 times it=
s
> delivery at that pressure or pto rpm and time for a hectare. So, if your =
rig
> runs for 32 seconds over 100m at 3 bar, then you can take your nozzle
> delivery for that time and pressure and multiply it by 200 to get the
> delivery per hectare.
>
> SS
>





Received on Wed Apr 06 2011 - 11:04:31 EDT

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