Water is known to be a good solvent. However, this characteristic of water also makes it dissolve a lot of things that are not necessarily beneficial to the human body. In nature, water dissolves carbon dioxide in the air, lime in the formation, and eventually forms calcium carbonate and magnesium carbonate ions.
The softness and hardness of water depend on the content of calcium and magnesium ions. The hardness of drinking water measured in China is to convert calcium and magnesium dissolved in water into calcium carbonate, and the content of calcium carbonate per liter of water is measured as calcium carbonate in water. When the content is less than 150 mg/L, it is called soft water, and when it is 150-450 mg/L, it is called hard water. Commonly used hard waters include well water, salt water, sea water and other waters containing more calcium and magnesium. Soft water includes fresh water such as river water and lake water.
Why can't hard water be used to dilute pesticides ? Because calcium, magnesium and other substances in hard water can reduce the suspension rate of wettable agents or emulsifier with emulsifiers to synthesize calcium and magnesium precipitates, and destroy the emulsifying properties of emulsifiable concentrates. It will reduce the control effect of pesticides, and it will also cause phytotoxicity. Soft water contains less calcium and magnesium, and it does not destroy the performance of the agent and reduce the control effect. Therefore, when diluting pesticides, you should not be careless, otherwise the consequences will be serious!
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