There are the losses of beneficial organisms - biological pest control agents in a sprayer machines during the application. The losses increase with a number of liquid flows inside the sprayer installation. The mathematical formulas to count an amount of number of flows cycles were performed. The analysis of influence of liquid capacity in sprayer tank, sprayer pump flow rate and liquid discharge flow rate from sprayer on the number of liquid circulation cycles inside the sprayer hydraulic system were made by using these mathematical formulas.
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