Recently, a calculation ruler for measuring the concentration of pesticides has come out, which solves the problem that farmers have long been difficult to measure the concentration of pesticides. The invention unit won the national invention patent certificate. It is understood that the invention of this patent is two senior agronomists in the Agricultural Bureau of Ziyang City, Sichuan Province. The pesticide concentration slide ruler is characterized by a movable ruler with a pre-calculated pesticide multiplier, dosing amount and water addition amount. The pesticide multiplier is indicated on all pesticide labels or instructions, so the user only needs to pull the slide rule to find the pesticide multiplier, and there is a corresponding dosing amount and water addition amount.
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