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.

Related Posts:

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  • Cation exchange between soil & plants Cation exchange The ‘soil cations’ essential for plant growth include ammonium, calcium, magnesium, and potassium. There are three additional ‘soil cations,’ which are not essential plant elements but affect soil pH. The a… Read More
  • Forms of Essential Elements Taken up by Plants ElementAbbreviationForm absorbed NitrogenNNH4+ (ammonium) and NO3- (nitrate) PhosphorusPH2PO4- and HPO4-2 (orthophosphate) PotassiumKK+ SulfurSSO4-2(sulfate) CalciumCaCa+2 MagnesiumMgMg+2 IronFeFe+2&nb… Read More
  • Movement of nutrient from soil to root Movement of nutrient from soil to root There are three basic methods in which nutrients make contact with the root surface for plant uptake. They are root interception, mass flow, and diffusion. Root interception: Root in… Read More
  • CEC and surface area of common soil minerals CEC and surface area of common soil minerals MineralTypeCEC (surface charge cmolc/kg-1)Surface area (external m2/g-1) SmectiteHigh activity clay-80 to -15080 to 150 VermiculiteHigh Activity clay-100 to -20070 to 120 Fine M… Read More

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