Cabbage
- Apples
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- Cabbage
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- Grassland & Pasture
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Cabbage - Deformation
Symptoms
Older Leaves show a light brown and withered necrotic border zone.
With ongoing deficiency necrosis progresses from the edge to the middle.
Leaf margins are cupped upwards.
Reasons
Potassium deficiency
Potassium deficiency made worse by
- Acidic soils (low pH)
- Sandy or light soils (leaching)
- Drought conditions
- High rainfall (leaching)
- or heavy irrigation
- Heavy clay (illite) soils
- Soils with low K reserves
- Magnesium rich soils
Potassium is important for
- Resistance to cold injury and drought
- High yields through increased biomass and head weight
- Consistent, early and evenly matured marketable crop
