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Symptoms
Youngest leaves show a faint yellowgreen tint.
Reasons
Iron deficiency
Iron is the micronutrient needed in greatest quantities within brassicas, but deficiencies are rarely seen.
Lack of Fe is most frequent on light, alkaline and calcareous soils with low organic matter. However, soils with peat substrates have a naturally low Fe content.
High P fertilization may also induce Fe deficiency.
Iron deficiency made worse by
High pH
Water logged soils
Calcareous soils
High copper, manganese or zinc soils
Iron is important for
Early leaf development and crop productivity
Needed in relatively large amounts
Yara recommended fertilizers for Iron
YaraVita CROPLIFT PRO
YaraVita CROPLIFT PRO
Broccoli: 2.5 to 5 kg/ha. Repeat at 10 to 14 day intervals as necessary. Water rate: 200 l/ha.