Hello John,
I think it is a little tricky to make a formula, so I have made up a simple 
Excel spreadsheet.
If you are dealing with trees at 18 x 8 as you say, then you would drive 2408 
feet to spray your acre of 331 trees (8 feet x 331 trees = 2645 feet - I have 
adjusted your figure of 300 per acre to 331 as that is how many trees you will 
get per acre at your selected spacing). As a mile is 5280 feet, you are driving 
0.50 miles to the acre.
So if you are driving at 2.4mph (for example), it will take you 12.5 minutes to 
spray your acre. (0.46/2.4*60)
And if you are spraying 9 gallons per minute (for example), your gallons per 
acre would be 112.7


Con (Cornelius) Traas
Department of Biological Sciences, (and The Apple Farm)
University of Limerick.
Ph: 061-202905
M: 086-6091998
T: @theapplefarmer

From: apple-crop [mailto:apple-crop-boun...@virtualorchard.com] On Behalf Of 
John Bruguiere
Sent: 02 March 2017 14:16
To: apple-crop@virtualorchard.com
Subject: Re: [Apple-Crop] sprayer calibration debate


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<mailto: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<mailto: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<mailto: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<tel:%28207%29%20882-8074>
cortla...@icloud.com<mailto:cortla...@icloud.com>




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--
Maurice Tougas
Tougas Family Farm
Northborough,MA 01532
508-450-0844
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Attachment: Sprayer Cal.xlsx
Description: Sprayer Cal.xlsx

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