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Arizona Pesticide Applicator Test, Random
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Terms in this set (18)
If in a catalog a nozzle was #8003 what does that number stand for?
The last two numbers stand for the GPM (gallons per minute) that the nozzle can put out at the pressure given in the catalog. The numbers before the last two numbers represent that angle at which the nozzle should be set
What does GPA stand for?
Gallons per acre
What does the angle of the nozzle mean fore the boom sprayer?
The wider the angle the lower the boom sprayer can be to the ground
Why is it important to calibrate your equipment?
prevents wasted product by depositing required amount on target
What is the procedure for determining your travel speed on your equipment?
1- mark a test course 100 fet long in terrain similar to field
2- load sprayer 1/2 full of water
3- time the trip to the tenth of a second in both directions
4- average the two trips using the following formula: (course length in ft x 60)/(travel time in sec x 88)= travel speed in mph
What information will you need off your label to calibrate your equipment?
application rate- GPA
nozzle type, droplet six, spray pattern
nozzle pressure- PSI
What are the steps for calibrating a boom sprayer?
1- determine travel speed
2- find nozzle make model and number, application volume in GPA, nozzle spacing in inches
3- Calculate nozzle output in GPM
4- then collect and measure output of each nozzle for one minute
* actual amount must be within 5% of calculated amount.
How do you calculate GMP for a broadcast application?
(application volume or GPA x travel speed in mph x nozzle spacing in inches)/ 5940
How do you change your calculations for boom sprayers if band sprayers are used?
Use the band or swatch width in inches instead of the nozzle spacing. if their are multiple nozzles then do (band width in inches)/(# of nozzles per row)
If you are using a measure device with ounces to calibrate equipment how do you convert it to gallons?
Divide the number of ounces by 128 to get gallons
What do you need in order to calibrate a backpack sprayer?
a calibration distances table in order to determine what size your test course should be based on the band width or nozzle spacing of your sprayer.
What things do you need to know before calibrating a granual applicator?
- size of the metering opening
- agitator speed
- applicator travel speed
- granual size, shape and density
- roughness of field
- relative humidity and temperature
What is the process for calibrating a granule applicator doing a broadcast application?
1- spread ou a large tarp and determine area (lxw)
2- run applicator across tarp at normal speed
3- measure swatch width of granules on tarp (lxw)
4- gather all granules and measure weight of just granules (subtract container measured in)
5- (weight collected in lbs x area given on label in sq ft)/ (swatch area in sq ft)= pounds per acre
6- check rate with label rate and adjust accordingly
How do you calibrate a granule applicator doing a band application?
1- calculate speed of equipment
2- set outlets at recommended label settings
3- operate at normal speed collecting granules in a mounted bag and time how long it takes to get the desired amount of granules
4- weigh output in oz to see if all outlets are the same
5- make it into lbs per minute using: ((weight collected in oz)/ collection time in min)) x 0.0625= pounds per minute
6- calculate output rate by adding together all the outlets
7- calculate acres per minute by: (swatch width in feet/43,560) x travel speed in ft per min= acres per minute
8- then calculate pounds per acre= (output rate)/( acres per minute)
What is different about the rates given on labels for in row applications?
labels give rates in ox per 1000 ft of row
How do you calibrate equipment for an in row application?
1- find product needed by converting label rate to pounds per acre= (oz per 1000 ft x 33)/ row spacing in inches
2- mark 1000 ft in field
3- adjust equipment based on labels
4- fill hoppers and operate at normal speeds
5- drive 1000 ft
6- weigh output and compare to calculated
Why is the number 5940 important in calibrating equipment?
its a constant that converts units to GPM
What does WPS stand for?
Worker protection standard.
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