Great Plains Fertilizer Arm Kits - Manual (Page 13)

7/31/2002 204-326M
11 Maintenance and Storage
Size Selection Of Spray Tip Or
Nozzle
Based on the chemical manufacturer’s recommenda-
tions on GPA application rates and nozzle types, a
suitable spray tip size is chosen from the catalog tabula-
tions. Since all the tabulations are based on spraying
water, which weighs 8.34 lbs. per USA gallon, conver-
sion factors must be used when spraying solutions
which are heavier or lighter than water. To arrive at the
rate of solution to be sprayed - multiply the conversion
factor by the tabulated GPM and GPA rates shown in this
manual.
Imperial Gallon = 1.20 U.S.A. Gallons
Weight Of Solution
Specific
Gravity
Conversion
Factor
7.0 lbs. per gallon .84 1.09
8.0 lbs per gallon .96 1.02
8.34 lbs. per gallon - Water 1.00 1.00
9.0 lbs. per gallon 1.08 .96
10.0 lbs. per gallon 1.20 .91
11.0 lbs. per gallon 1.32 .87
12.0 lbs. per gallon 1.44 .83
14.0 lbs. per gallon 1.68 .77
16.0 lbs. per gallon 1.92 .72
18.0 lbs. per gallon 2.16 .68
20.0 lbs. per gallon 2.40 .65
EXAMPLE: It is desired to apply 55 lb/acre of nitrogen in 30" rows. {28% N, weight is 10.65 lb/gal from the above chart}
55 lb x 1 x 1 = 18.44 gal
acre 10.65 lb .28 solution acre
acre
Need to apply 18.44 gal/acre. From the 30" TeeJet Nozzle chart, the 4U-SS010 applies 16.5 gal/acre at 10 psi and 6 mph,
and applies 25 gal/acre at 10 psi and 4 mph. So, to interpolate,
gal/acre MPH
16.5 6
18.44 2.0 Difference
25.0 4
To calculate the correct speed to apply the 18.44 gal/acre, multiply the ratio of the difference in the application rate by the
speed difference, and subtract from the higher speed.
1.94 x 2.0 mph =.45 mph
8.50
6.0 mph - .45 mph = Application speed for 18.44 gal/acre
5.54 mph = Application speed for 18.44 gal/acre
Maintenance and Storage
Maintenance
Proper servicing and adjustment is the key to the
long life of any farm implement. With careful and
systematic inspection, you can avoid costly main-
tenance, time and repair.
1. After using your Fertilizer Arm for several
hours, check all bolts to be sure they are tight.
Storage
1. Clean the Fertilizer Arms as necessary.
2. Store the Fertilizer Arms inside if possible for
longer Fertilizer Arm life.