Diffusion of Soil Solution

  • movement of elemental ions into proximity of plant roots for absorption
  • ions move from within soil solution from an area of high concentration to an area of lower concentration by diffusion
  • as ions are absorbed, the concentration gradient causes ions to diffuse
  • movement by diffusion is measured in millimeters
  • doesn’t require much soil moisture, unlike mass flow
  • most elemental ions move this way

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