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11. The number of ounces is equal to gallons per acre your sprayer is deli- 

 vering. 



1 2 . Example ; 



a. Nozzle spacing is 20 inches. 



b. Measure off 20'» feet (from table). 



c. Catch the output of water from one nozzle while traveling 20^4 feet. 



d. The output in ounces for one nozzle is equal to gal Ions per sprayed 

 acre. 



Suppose you collected 20 ounces. Your sprayer is delivering 20 gallons 

 per acre. But let's assume the herbicide label suggests at least 30 gal 

 water/acre. The easiest way to change sprayer output is to change travel 

 speed. Slow down the travel speed and collect the output from one nozzle 

 for 20'» feet. If you are able to slow down the travel speed enough to 

 collect 30 ounces then proceed to step e below. If not, change nozzle tips 

 for a larger opening and proceed from step a above until output is correct, 

 or at least 30 gal/A or as suggested by the herbicide label. When output is 

 correct, proceed to e. 



e. The sprayer is now operating at the pressure and output suggested 

 on the label. Let's suppose we plan to spray glyohosate (Roundup") 

 herbicide as indicated on the label. Roundup" contains ^4 lbs 

 active ingredient per gallon of product. The label suggests appli- 

 cation of 1 1/2 lbs active ingredient per acre sprayed. Each quart 

 of Roundup" contains 1 lb of herbicide, hence to 30 gals water in 

 the sprayer we add 1 1/2 quarts (1 1/2 lbs a.i.) of Roundup*^ and 

 proceed with spraying, assuming we have only j^ acre of total area 

 to be sprayed. If not, we have one more step. 



f. Let's remember herbicide rates are given in amount per acre 

 sprayed . For undertree spraying we are not spraying the entire 

 orchard floor. 



Let's assume our undertree boom has three nozzles spaced 20 inches 

 apart, with an effective coverage of 60 inches (5 feet). We'll be 

 spraying each side of the tree row or ten feet for each row. 



If the tree rows are 20 feet apart we will actually be spraying 

 only 1/2 acre for each acre of orchard covered. Again, suppose our 

 orchard includes 8 acres of trees. Since we are actually spraying 

 only 1/2 acre for each total acre covered in this example, we will 



really be spraying ^ acres, not 8. 



