Determining Rate Setting-Fertilizer
IMPORTANT:
Rates shown in charts are only to be used as a guide. See RATE CHECK-METHOD 1 or RATE CHECK-METHOD 2 in this section for accurate rate test.
Rates per acre are determined by adjusting speed selector levers on gear case or switching drive sprocket configuration.
NOTE:
Nitrogen fertilizers generally weigh less than high potash or phosphorus.
Rate charts are based on fertilizer having a standard density of 1041.2 kg/m
3
(65 lb/ft
3
).
1.
Find actual density of fertilizer used. See USING DENSITY METER in this section.
2.
Locate actual density on Fertilizer Density Chart and find conversion factor.
3.
Multiply desired metering rate by the conversion factor. Locate that value on rate chart, match it with seed index value and adjust speed selector levers to value. See FERTILIZER DRIVE SETTINGS in this section.
EXAMPLE:
-
Product: Fertilizer
-
Desired Rate: 112 kg/ha (100 lb/acre)
-
Actual Density: 800.9 kg/m
3
(50 lb/ft
3
)
-
Drill: 7-1/2 in. row spacing
-
Drive: Drive 2
1.
Locate conversion factor from Fertilizer Density chart.
800. 9 kg/m
3
(50 lb/ft
3
)
2.
Multiply desired rate by conversion factor.
112 kg/ha x 1.30 = 146 kg/ha
(100 lb/acre x 1.30 = 130 lb/acre)
3.
Find value, 146 kg/ha (130 lb/acre) on rate chart and move speed selector levers to position "B5".
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