Effects of soil pH

NUTRIENT AVAILABILITY

  • Controls the availability of the essential nutrients
  • Availability of nitrogen, phosphorus, sulfur, calcium, magnesium, sodium, and molybdenum is limited under acidic conditions
The effect of soil pH on the availability of essential plant elements
Figure 4. The effect of soil pH on the availability of essential plant elements. Greater nutrient availability is indicated by thickened lines, whereas narrow lines indicate a decrease in availability.

BIOLOGICAL ACTIVITY AND PROCESSES

  • Determines the abundance of soil microorganism
  • Determines which plant species will grow
  • Low soil pH slows the biological transformation of ammonium to nitrate

PHYSICALLY

  • Indirectly, high pH can disrupt soil structure, or aggregation.

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