• Chelated iron is simply iron(fe) that has undergone chelation, a chemical process that firmly binds the iron (fe) molecule to another substance such as amino acid.
• This forms a more stable ring shape molecule that are easier for plants to absorb.
Why iron (fe) is required by plants?
• For formation of chlorophyll in plant cell (that gives plant its green colour).
• As an activator for respiration and photosynthesis.
Symptom of iron(fe) deficiency in plants
• The leaf tissue turn yellow but the vein remains green.
• In severe cases the entire leaf can turn yellow
Nitrogen deficiency can also cause the entire leaf turn yellow, so how to determine the actual problem?
• Iron (fe) deficiency shows symptom on the new growth (young Leaf) towards the shoot. Only on a very severe case then the edge of older leaf can turn brown, so it affect from top downward.
• Nitrogen deficiencies affects older leaf first then move upward.
Why iron deficiencies occur?
• Where soil are highly alkali or water used for watering is too alkali.
• High pH ties up iron (fe) by the soil
• High soil temperature
• High light intensity
• High level of Manganese (Mn) in the soils can block the uptake of iron (fe). Too much iron in the soil can also cause deficiency of Mn.


EICHHORNIA CRASSIPES


PANDANUS AMARYLLIFOLIOUS




Photos of test plot showing ginger rhizome started to germinates












