# Re: [Apple-Crop] sprayer calibration debate

```Since I upgraded my tractor this winter, I plan on recalibration and this
is the method I plan to use.  Adjust the nozzles and the tractor speed
until I feel I get adequate coverage of the trees.  I will then fill my
tank with 50 gallons of water, and spray it over a prescribed route.  When
the tank is empty, I calculate the acres sprayed.  From that I can
determine the number of gallons per acre.  To that number of gallons, I
will add the chemical required per acre.  Since we are high density, well
pruned, I multiply by .7 (captan:  6# x .7= 4.2 #).  If I travel the same
route, I will get the required spray per acre.```
```
A different question:  my new tractor has an enclosed cab (no more monkey
suit), with an activated charcoal filter.  What is the opinion on the
necessity of also wearing a respirator.  EPA would say yes, but are they
too cautious.
Hal Wentzel
Pleasant View Orchard
Niagara, Wi
715-927-2050

On Thu, Mar 2, 2017 at 8:16 AM John Bruguiere <j...@dickiebros.com> wrote:

> Hello all, need some healthy practical advice on sprayer calibration.
> Specifically air blast sprayers.  For decades we have measured a block of
> trees to determine acreage, sprayed out tank and determined gallons per
> acre based on what area was covered in tank. For example trees planted at 8
> x 18 spacing gave us 300 trees to acre, we sprayed out tank, counted trees
> and determined that our sprayer puts out 2.5 acres per tank.  we used this
> to determine amount of material to put in the tank etc. All the calibration
> formulas , I have seen require tree row volume(height x row spacing) to be
> part of equation.  I have 4-5 different spacings in 100 acres of orchard
> which makes it more of a headache to constantly figure gallons per acre and
> spray materials needed in each different block(thus the reason we simply
> measured trees per acre). I know my speed , i know my gallons per minute
> but can't find an equation that converts this to gallons per acre without
> tree row volume.
>
> need a simple but effective solution...any takers?
>
> in Virginia we have plums in full bloom, fantasia and red gold nectarines
> in pink and some open blooms, 21 degrees forecasted on friday and saturday
> night.
>
> God Bless,
>
> John Bruguiere
>
> Dickie Bros. Orchard
>
> On 1/30/2017 6:36 PM, Arthur Kelly wrote:
>
> I agree Mo.  We try and remove trees every year and plant every year.  I
> did use the word can to hedge the productive life of a block.
>
> Sent from my iPhone
>
> On Jan 30, 2017, at 5:48 PM, maurice tougas <appleman.maur...@gmail.com>
> wrote:
>
> Art
>
> I agree that it's great to be out pruning. I disagree that you should
> expect a longer productive life with high density systems. My goal here is
> to be looking at replanting when the orchard reaches twenty years or so.
> New varieties, strains of varieties and improved planting system encourage
> 5% renewal in my opinion.
>
> My best to you
> Mo Tougas
>
> On Mon, Jan 30, 2017 at 1:27 PM, George Greene <cortla...@icloud.com>
> wrote:
>
> Art:
>
> Your comment makes sense to me.  Right now I have a cold and I fell on the
> ice on Dec. 29th and I am still suffering.  Pt may help but it may take a
> while.
>
> I suppose that you are enjoying the warmer weather.
>
> Be well, George
>
> On Jan 30, 2017, at 12:43 PM, kellyorchards <kellyorcha...@gmail.com>
> wrote:
>
> Ruminations after a morning pruning.  The weather is ideal.  The temps are
> in the high 20's, the wind is light and the sun is shining.  Weather like
> this is why we live here.  Permanent limbs ultimately and inevitably get
> too large.  This is why high density systems can have a longer productive
> life than less dense orchards.
>
>
>
>
> Art Kelly
> Kelly Orchards
> Acton, Maine
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>
> George Greene
> 68 Willow Lane
> Wiscasset, ME 04578
> 207-882-8074 <%28207%29%20882-8074>
> cortla...@icloud.com
>
>
>
>
>
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>
>
>
> --
> Maurice Tougas
> Tougas Family Farm
> Northborough,MA 01532
> 508-450-0844
>
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--
Hal Wentzel
Pleasant View Orchard
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