Checking Fertilizer Rates

Liters Per Hectare Conversion Chart
Row Spacing Conversion Factor
51 cm 0.081
56 cm 0.074
76 cm 0.054
91 cm 0.045
97 cm 0.043
102 cm 0.041

 

Gallons Per Acre Conversion Chart
Row Spacing Conversion Factor
20 in. 0.255
22 in. 0.232
30 in. 0.170
36 in. 0.142
38 in. 0.134
40 in. 0.128

 

1. Calculate size of collection container required.

Size of container required = L/ha (gpa) expected ÷ conversion factor.

METRIC example, 45 L/ha is expected application rate. Conversion factor for 76 cm row spacing is 0.054.

45 ÷ 0.054 = 833 mL

Use a container capable of easily collecting at least 833 mL.

STANDARD example, 18 gpa is expected application rate. Conversion factor for 30 in. row spacing is 0.170.

18 ÷ 0.170 = 106 oz

Use a container capable of easily collecting at least 106 oz.

2. Tie a container to machine frame next to a fertilizer opener. Remove delivery hose from opener and insert hose into container.

3. Drive forward 244 m (800 ft) at planting speed.

4. Measure number of mL (oz) in container.

5. Calculate actual application rate.

Measured mL (oz) x conversion factor = actual rate

METRIC example, 789 mL were captured in container. Conversion factor for 76 cm row spacing is 0.054.

789 x 0.054 = 42.69 L/hectare (Actual Application Rate)

STANDARD example, 118 oz were captured in container. Conversion factor for 30 in. row spacing is 0.170.

118 x 0.170 = 20 gpa (Actual Application Rate)

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