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It is also essential for chlorophyll synthesis, although not a structural part of it.
Chlorosis of leaf base, interveinal chlorosis
Overall chlorosis
Bleaching, necrotic spots may appear
Conditions that give rise to iron deficiency
Factors affecting iron availability
♦ Composition of the nutrient solution (synergy / antagonism)
♦ Chelating agent
♦ pH
♦ Temperature
Phosphorus, Calcium, Zinc, Copper and Manganese interfere with iron uptake
Potassium facilitates iron uptake
Stability of iron chelates
♦ To ensure stability in the nutrient solution, iron should be applied in a chelated form
♦ Select a chelate that suits pH level of the solution and the soil
pH management
pH level in the drip line should be 5-6, depending on the crop. If necessary, use some acid or alkaline fertilizers to adjust the pH.
Adjust the pH of the solution in the fertilizer tank to the stability range of the specific chelate.
If the pH is above 6, add some ammonium-based fertilizer such as Haifa MAP to the nutritional program.
Temperature At low temperature iron uptake is slowed down
♦ Consider heating of the root zone using heating pipes
♦ Heat the nutrient solution if practical
♦ When iron uptake by roots is inefficient, iron fertilizers may be applied by foliar spray
Haifa’s Iron fertilizers
Iron chelates
Formulae contain iron
Use to prevent Fe precipitation with P
Development of iron deficiency chlorosis on raspberry leaves, left to right
For more information visit our iron deficiency in plants and soils!