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Nutrient Benefits


High Mo levels can reduce the availability of:

  • Copper
  • High Sulfur reduces Mo availability
  • Nitrogen


  • Good supply of Mo improves nitrogen uptake and conversion


  • Co-factor in the enzyme nitrate-reductase
  • Aids in the conversion of nitrates to ammonium (initial stage of synthesis of proteins)
  • Helps plants to utilize nitrate N
  • Essential for rhizobia to enable legume crops to fix aerobic (atmospheric) N
  • Involved in phosphate and Fe metabolism

Deficiency Symptoms

  • Similar to N deficiency
  • Yellow, pale leaves
  • Stunted growth
  • Necrotic leaf margins and tips
  • Symptoms begin in older leaves first
  • Flower wither or are suppressed

Factors Affecting Availability

  • Soils with low P levels
  • Soils derived from parent materials low in Mo
  • Low pH soils (especially if they contain Al or Fe oxides)

Sensitive Crops

  • Cucurbits, crucifers, pulses


The following OMEX products can assist with addressing and correcting Molybdenum deficiency:

Visual Guide