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When preparing the spraying liquid, be sure to spray the quantity of agent recommended per hectare. The quantity of agent and the required quantity of liquid per hectare are stated on the packaging. In other cases, consult your dealer of crop protection chemicals.
Determine the exact quantity of spraying liquid to be prepared in advance. Preparing the exact quantity will reduce the amount of residual liquid. In the case of large fields it may be necessary to prepare several tank loads.
Suppose you want to spray a 10 ha field with 300 l/ha and 2 kg of chemicals per ha. The machine has a nominal tank content of 2400 liters. This means that you will need a total of 3000 l of spraying liquid. In this example you will therefore need two tank loads.
The quantity of chemicals per tank load is calculated as follows:
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X = M x T / H
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X = |
qty of chemicals per
tank load in liters |
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M = |
qty of chemicals (kg or l)
per hectare |
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T = |
tank content in l. |
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H = |
quantity of liquid
per hectare (l/ha) |
For the first tank load (2 x 2400) / 300 = 16 kg of chemicals is required. You will have to fill the tank again. Suppose there are still 100 liters of liquid in the tank when you return for a second tank load, and the tank must be filled to 700 liters. Usually there is also a small quantity of residual liquid in the machine (suppose 20 liters). The quantity of chemicals to be added for the last tank load is:
2 x (700 - 100 + 20) / 300 = 4.1 kg.
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