. Chemical weed-control equipment. Weeds; Spraying; Spraying equipment. 4 6 8 10 12 14 16 18 GALLONS PER ACRE 260 250 240 230 38 220 210 200 UJI90 32 ft 180 Ol70 2 8 ZI60 UJI50 „I40 30 | I I I I I I I For nozzles 18 inches apart, read direct For other spocings, multiply readings of required discharge as follows: Spacing Multiply Z) O 1120 20 °-\00 £ 90 O 80 13 < 70 ® 60 50 40 30 20 10 00 20 40 60 80 100 120 140 160 180 200 GALLONS PER ACRE CHART A CHART B Gallons per acre and mph can also be found with
. Chemical weed-control equipment. Weeds; Spraying; Spraying equipment. 4 6 8 10 12 14 16 18 GALLONS PER ACRE 260 250 240 230 38 220 210 200 UJI90 32 ft 180 Ol70 2 8 ZI60 UJI50 „I40 30 | I I I I I I I For nozzles 18 inches apart, read direct For other spocings, multiply readings of required discharge as follows: Spacing Multiply Z) O 1120 20 °-\00 £ 90 O 80 13 < 70 ® 60 50 40 30 20 10 00 20 40 60 80 100 120 140 160 180 200 GALLONS PER ACRE CHART A CHART B Gallons per acre and mph can also be found with these charts. Note that when using these charts with nozzle spacings other than 18 inches, the gpm or gph found from the chart must be multiplied by the proper factor as shown, and when the charts are used to find gallons per acre and mph, the answers must be divided by this correction factor. 2. The desirable range of nozzle pres- sures for various spray applications has already been shown. This range allows for some latitude in final adjustment of the pressure to give the desired gallonage per acre. 3. In designing the boom, the nozzle spacing can be chosen which best fits the spray jobs to be done. Once chosen, it is generally not changed. 4. The size of the nozzle opening is the easiest of the factors to change for different spraying requirements. It is pos- sible, with a set of different nozzle sizes, to vary the gallons per acre, over wide limits, with only minor changes in speed and pressure. 5. Another factor indirectly involved with sprayer discharge is the amount of toxicant or active ingredient in the spray mix. This can be altered by adding oil or water to the purchased spray, thus chang- ing the ratio of diluent to toxicant, or the amount of active ingredient which is ap- plied per acre. The right size nozzle for a particular spray application may be chosen by: 1. Using nozzle manufacturers' charts for a given brand of nozzles. 2. Consulting charts shown above
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Keywords: ., bookcentury1900, bookpubli, booksubjectspraying, booksubjectweeds
