Nutrition & Root-Zone Chemistry
Micronutrients, Cofactors & Root-Zone Chemistry
Iron, manganese, zinc, copper, boron, molybdenum, chlorine, and nickel are required in smaller quantities but participate in essential enzymes, redox reactions, structure, and metabolism. Small required amounts also mean excess can become important quickly.
Key concepts
- Micronutrient availability is strongly influenced by pH and chemical form
- Different micronutrients vary in mobility within the plant
- Chelation can influence metal solubility and delivery
- Deficiency-like symptoms can arise from root-zone chemistry even when total input is adequate
What to measure or observe
- Record tissue age where symptoms begin
- Review root-zone pH and EC
- Check source-water and fertilizer micronutrient content
- Avoid changing several trace elements at once when diagnosis is uncertain
Common mistakes
- Treating every new-growth chlorosis as iron-specific
- Stacking multiple micronutrient supplements
- Ignoring pH-driven availability
- Confusing total concentration with plant-available form
Visuals this lesson still needs
- Micronutrient function matrix
- Mobility pattern map
- pH availability concept
- New-growth chlorosis differential