Calibration Work Sheet Calibration is included at the

Calibration Work Sheet Calibration is included at the end of this presentation

Starts with the Application equipment Clean equipment of all pesticides (safety) ◦ In cleaning, you treat the equipment as have the toxic material you use Inspections – must be good working order ◦ ◦ ◦ Free of leaks – lines, tanks, pump, etc Proper pressure Agitation working Screens clean and proper size Hoses Nozzles – same type, size, wear

How often to calibrate? Before use in the spring or 1 st use Changing of carriers (water, fertilizer) Changing of nozzles Changing of spray volume Changing of pressure

Facts to know for field applications 43560 square feet in acre 128 ounces/ gal, Number of nozzles on spray boom Width of spray coverage (boom width) Volume of applicator (500 gal tank) Pressure (psi) Speed – ( PTO sprayers)

Known block size 1 acre or 10 acres Fill the tank Spray the area Measure the number of gallons used ◦ Calibrated ◦ Measure the amount of water added to fill the tank ◦ Divide gallons /by area sprayed

Disadvantages Overlapping or missing strips will induce treated area data Time required Difficultly in measuring volume used If chemicals are in the tank could be an application problem

One tenth acre method Length x width = square feet ( 1 a =43560 sq ft) 60 foot spray boom 43560 sq ft/60 ft =726 feet 726 x 60 = 43560 (1 acre) For. 1 of acre 726 ft/10 = 72. 6 feet x 60 ft =. 1 a Mark off 72. 6 feet and collect the water from 1 nozzle (3 times)

Water collected measured in ounces 23 nozzles on the sprayer 1 nozzle collected 12 ounces of water 12 ounces x 23 nozzles = 276 ounces/. 1 of an acre 276 ounces x 10 = 2760 ounces/ per acre 2760 ounces/128 ounces per gallon = 21. 5 gallons per acre

How many acres will the sprayer cover in one filling? 500 gallon tank Applies 21. 5 gallons per acre 500/ 21. 5 = 23. 25 acres (23 acres)

How much chemical to add to tank full? Product A is used at 1 quart/a 1 quart x 23 acres = 23 quarts per tank full Product B is used at 4 ounces/ acre 4 ounces x 23 acres = 92 ounces per tank

Options Spray as setup Ground driven (speed doesn't affect application rate) Change nozzles to a smaller number or reduce pressure to reduce the gallons per acre to 20 gallons per acre with a ground driven sprayer (keep with in recommended ranges for the sprayer and the label) PTO driven – increase ground speed, or reduce pressure or use a smaller nozzle

Example from Tee. Jet nozzle book Changing speed from 5 mph to 6 mph with 8004 ss nozzles at 40 psi will drop the application rate from 24 to 19. 8 gallons per acre

Granular material Broadcast materials Collect the material over a know area and determine the sq ft treated and multiply it by the part of acre collected Banded materials – oz/ 1000 ft of row. ◦ as weight of these material great vary each material has a calibration tube which you attach to the tubes and just drive the prescribed distance and read the tube

Broadcast 20 by 20 tarp = 400 sq ft =. 0092 acres ◦ Collected 5 lbs on. 0092 a to convert divide lbs/ by of acre = 543. 5 lbs/ 1 a 20 drill driven 10 ft – collect. 25 lbs ◦ 20 x 10 = 200 sqft or. 0046 a ◦. 25/. 0046 = 54. 34 pounds per acre

In the Shop calibrations Jack up the wheels and use math to determine how many turns of wheels to equal the desired distance (sq ft covered) and collect the material in a tray or pans and weight in and then do the calibrations

Banded application Width of the band or area sprayed 3 foot wide beds on six foot spacing 50% of land is being sprayed Material Application rate per acre does not change

Landscape applications Product recommendations often base on per 1000 sq ft or per 100 sq ft Ounces per 1000 sq ft or oz per 100 sq ft Applied in gallons per 1000 sq ft

Pest control operators Cubic square feet (Lx. Wx. H) Linear feet gallons or oz per foot Square feet Packets Oz measurements Foam products Dust

Math Problems

1. Yard and garden sprayer has a 25 gallon tank with 7 nozzles with a spray width of 11. 6 ft Label rate of brand X is 2 qt per acre to be applied in 10 to 40 gallons per acre Using the 1/10 of acre method – Your driving distance for 1 acre is ______ Your driving distance for. 1 acre is _______ Your driving distance for 1/100 of an acre would be____ You ran the test three times and collected from 1 nozzle 18 oz, 18. 5 oz, and 18. 3 oz over the. 1 acre. How many gallons are you applying per acre? _____

1. Yard and garden sprayer has a 25 gallon tank with 7 nozzles with a spray width of 11. 6 ft Label rate of brand X is 2 qt per acre to be applied in 10 to 40 gallons per acre Using the 1/10 of acre method – How much material do add per tank? ______ Using the same size sprayer but with different nozzles. The application rate of brand C is of 1 oz 1000 sq ft, you drive distance is 86 ft, collect 18. 25 oz, 18. 5 oz , 18. 3 oz (3 test runs) How many gallons does your sprayer apply per 1000 sqft? ___ How many oz of Brand C do you need to add to 25

2. You have 2 field crop sprayer has 27. 5 foot boom which has a spray width of 30 ft. There are 23 nozzles on the boom and it has a 300 gallon tank. You need to apply 3 different materials. The application rate of Product A is 1 quart per acre. Product B is applied 4 ounces per acre and product C is applied at 1 quart per 100 gallons. Your goal is to apply 20 gallons per acre. You drive sprayer A 145. 2 ft and collect – 12. 5 oz, 13. 8, and 14. 2 oz. from 3 different nozzles. You drive sprayer B 145. 2 ft and collect – 14 oz, 13. 8 oz and 14. 2 oz from 3 different nozzles You repeated the test three times and got the same results

2. You have 2 field crop sprayer has 27. 5 foot boom which has a spray width of 30 ft. There are 23 nozzles on the boom and it has a 300 gallon tank. You need to apply 3 different materials. The application rate of Product A is 1 quart per acre. Product B is applied 4 ounces per acre and product C is applied at 1 quart per 100 gallons. Your goal is to apply 20 gallons per acre. Gallons/ acre A= Gallons/acre B= What do you recommend? How much of each product do you add to the tank? Product A Product B Product C

3. You need to determine how many pounds of granular materials to apply per 1000 sq ft for example lawn herbicide/fertilizer. The label calls for 20 pound per 1000 sq ft. Your spreader covers 5 ft. How many feet do need push the spreader to get. 1 of 1000 sq ft. ? You have marked off a travel distance of 10 ft. The amount of material collected with the following gate Settings – No 3 =16 oz; No 5 = 20 oz; No 7 =32 oz applied. Which is the correct setting to apply 20 pounds per 1000 sq ft?