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Nutrition management
Manganese deficiency
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Yellowing between the veins of young leaves.
Is common on highly alkaline, calcareous soils. Is worse on fluffy soils, and wheel tracks are not as badly affected.
Is often worse on fluffy soils.
Apply manganese at seeding in fertiliser, on the seed or as foliar application.
Deficiency late in the season may lead to discolouration, splitting and deformity of seeds.
N Wilhelm, SARDI