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.
Iron - Deficiency Photos
R3 Agronomic Platform
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.