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Which factor does NOT directly influence a pesticide's leaching ability?

  1. Soil texture

  2. Wind speed

  3. Organic matter

  4. Pesticide solubility

The correct answer is: Wind speed

Soil texture, organic matter, and pesticide solubility are all factors that directly influence a pesticide's leaching ability. However, wind speed does not directly influence leaching. Wind speed can indirectly impact pesticide leaching by affecting the movement of particles in the soil or the amount of precipitation received, but it is not a direct factor affecting leaching.