A label recommends a spray volume of 20 gallons per acre and the producer operates a planter at 6 miles per hour. Based on previous experience with crop cultivation, a 12-inch band width is desired. The row spacing is 30 inches. The nozzles are listed in the table without spray angles. Be sure to check calibration.
Final selection depends on the clearance behind the planting unit.
Mount the nozzles and readjust the height until the band width is achieved at the target. In this example, the target is the soil surface behind the planter so the proper band width would be set on the soil surface. In the future, if any changes in application rate are made, recalibration should be done. Stake this distance off in a field you will be spraying. Instead of using row spacing to determine travel distance, use nozzle spacing on the boom.