Conversion Factors (Calibrating for Carriers Other Than Water)

For the purpose of choosing nozzle sizes for carriers other than water, a conversion factor must be applied to desired application rate of solutions lighter or heavier than water. To match nozzle tip output to solution, multiply the desired application rate of solution (gallons-per-minute or gallons-per-acre) by the conversion factor listed to arrive at Adjusted Calibration Rate (if using water).

Weight of Solution lb/gal (kg/l) Example Specific Gravity Conversion Factor
7.00 (0.84)   0.84 0.92
8.00 (0.96)   0.96 0.98
8.34 (1.00) Water 1.00 1.00
9.00 (1.08)   1.08 1.04
10.00 (1.20)   1.20 1.10
10.65 (1.28) 28% Nitrogen Solution 1.28 1.13
11.00 (1.32) 7-27-7 Fertilizer 1.32 1.15
11.06 (1.33) 32% Nitrogen Solution 1.33 1.15
11.40 (1.37) 10-34-0 Fertilizer 1.37 1.17
11.50 (1.38) 12-0-0-26 Fertilizer 1.38 1.17
11.60 (1.39) 11-37-0 Fertilizer 1.43 1.20
12.00 (1.44)   1.44 1.20
14.00 (1.68)   1.68 1.30

 

When spraying 32% Nitrogen Solution at 25 Gallons-Per-Acre (GPA), the nozzle tips should be selected (using water) to deliver 28.75 Gallons-per-Acre, due to the higher density of nitrogen solution.

25 X 1.15 = 28.75 Desired Application Rate x Conversion Factor = Adjusted Calibration Rate for Water

NOTE: SprayStar target application rate will remain at 95 Lpm (25 gpa) since SprayStar is a flow based system.

OUO6092,0000E02 -19-29MAR07-1/1