Plant Nutrition

Molybdenum Nutrient Info

Molybdenum - Quick Facts

  • Molybdenum is essential for the process of symbiotic nitrogen (N) fixation by Rhizobia bacteria in legume crops.
  • Molybdenum is needed by the plant in the synthesis and activation of nitrate reductase enzyme which reduces nitrate to ammonium in the plant.
  • Several materials supply Mo and can be mixed with NPK fertilizers applied as foliar sprays or used as a seed treatment.
  • Form used by plants: MoO4-2

Molybdenum - Role of Nutrient

  • Optimizes plant growth
  • Aids in the formation of legume nodules
  • Converts nitrates (NO3) into amino acids and proteins within the plant.
  • Involved in synthesis of ABA

Molybdenum - Nutrient in Soil


Molybdenum - Deficiency Symptons

  • The first symptoms of Mo deficiency is shown as a N deficiency, (yellow, yellow-green or orange mottling of leaves followed by curling of leaf margins) because Mo is required for N fixation by leguminous plants.
  • Appears in older leaves first, and then in younger leaves until the growing point dies.
  • Flowers wither or are surpressed, tissue has an abnormally low content of protein, total soluble nitrogen and chlorophyll.
  • Leaf blades distorted on cole crops (whiptail)

Molybdenum - Factors Affecting Deficiency

  • Soils below pH of 5.5 and low in Phosphorus will affect availability.
  • Application of nutrients containing sulphates and ammonium N can negatively impact Mo availability.
  • Increase in P will increase Mo. Availability of Mo increases with soil pH.
  • Soils derived from sands tend to be low in Mo.

R3 Agronomic Platform

R3 Lifecycle: Roots > Reproduce > Ripen

Roots – The vegetative stage looks to develop vigorous, healthy roots to maximize nutrient acquisition from the soil. The end result is a healthy root rhizosphere.

Reproduce – Supply the essential nutrients at reproduction to help the plant maximize pollen viability, flowering, pollination, seed set and fruit development.

Ripen – Late season nutrition is vital to optimize the nutrient density and quality of the crop.

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