Knowledge

Iron has the power to impact many important processes including stomatal activity, photo assimilate movement, disease resistance and insect infestation, and overall plant growth and yield.

Quick Facts About Iron

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.

Role of Iron in Plants

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 fixation in Nitrogen fixing plants.

Iron Deficiencies:

Deficiency Symptoms

Interveinal homogenous chlorosis on the younger leaves, veins remain green, areas in between become pale or almost white.
Stunted growth.
Deficiency shows up in terminal leaves (youngest leaves).
Necrosis of tips and margins as deficiency progresses.
Can be mistaken for Magnesium deficiency.

Factors Affecting Deficiencies

High soil pH. (pH >7)
Poor soil aeration.
High level of soluble salts.
Low organic matter, poorly drained, and/or compacted soils.
High bicarbonates in the soil.
Acidic sandy soils which also reduce Iron availability due to leaching and oxidation.
Soils receiving excessive amounts of water, especially in early spring.
Application of Nitrogen fertilizer may increase the chlorosis.
Deficiencies may also be induced by excess amounts of Copper, Manganese, Phosphorus, Sodium, Zinc, or by a shortage of Potassium.

All
Cereal
Canola
Soybeans

Iron Deficiency in Wheat

Iron deficiency is visible in this Wheat plant, exhibiting interveinal chlorosis, stunted growth and necrosis of tips and margins of the young leaves.

Iron Deficiency in Wheat

Iron deficiency is visible in this Wheat plant, exhibiting interveinal chlorosis, stunted growth and necrosis of tips and margins of the young leaves.

Iron Deficiency in Canola

Interveinal chlorosis is visible on the young leaves, exhibiting signs of Iron deficiency.

Iron Deficiency in Canola

Interveinal chlorosis is visible on the young leaves, exhibiting signs of Iron deficiency.

Iron Deficiency in Soybeans

Iron Recommended Products

Product	Type	Details
Ruffin-Tuff Iron	Micronutrient Soil	Product Details >
SoyGreen Granular	Micronutrient Soil	Product Details >
SoyGreen Liquid	Micronutrient Soil and Foliar	Product Details >

Nutrient Knowledge Guide

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