Plant Nutrition

Iron Nutrient Info

Iron - Quick Facts

  • Iron serves as an activator for biochemical processes such as protein synthesis and forming of respiratory enzyme systems.
  • Iron is a component of many enzymes associated with energy transfer, nitrogen reduction and fixation, and lignin formation.
  • Because Iron (Fe) is immobile in the plant, deficiency symptoms appear on newly formed leaves or terminal growth.
  • Form used by plants: Fe+2 (ferrous) or Fe+3 (ferric). However, Fe+3 must be reduced to the ferrous form before uptake can occur.


Iron - Role of Nutrient

  • Promotes the formation of chlorophyll
  • Acts as an oxygen carrier in respiration and photosynthesis
  • Is an activator for biochemical processes
  • Iron is an important part of the nitrogenase enzyme which effects N fixation in N fixing plants.


Iron - Nutrient in Soil

  • Iron deficiency symptoms increase with increases in soil pH.

Iron - Deficiency Symptons

  • Interveinal homogenous chlorosis of foliage, veins remain green, areas in between pale or almost white
  • Stunted growth
  • Deficiency shows up in terminal leaves
  • Necrosis of tips and margins as deficiency progresses
  • Can be mistaken for Mg deficiency

Iron - Factors Affecting Deficiency

  • High soil pH
  • Poor soil aeration
  • Low organic matter, poorly drained, and/or compacted soils
  • Alkaline soils (pH>7), or acidic sandy soils which also reduce Iron availability due to leaching and oxidation
  • Soils receiving excessive amounts of irrigation water, especially in early spring
  • Application of NO3- fertilizer may increase the chlorosis
  • Deficiencies may also be induced by excess amounts of Cu, Mn, P, Na, Zn, or by a shortage of K.

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.

More about R3