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Half-LifeHalf-life is a measure of how quickly a chemical breaks down in soil (soil half-life) or water (hydrolysis half-life). The longer a chemical remains in water or soil without breaking down, the more likely it is to leach through the soil. Shorter is better. Pesticides are less likely to leach when their hydrolysis half-life is less than six months and their soil half-life is less than three weeks.
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