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Potato
Magnesium and sulphur
| Required for: |
Tuber and starch yield, quality, storage properties of tubers
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| High deficiency risk: |
Mg: |
Light soils, cold temperatures, dry conditions
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S: |
Areas with low atmospheric sul-phur deposition
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| Deficiency symptoms: |
Mg: |
Older leaves develop interveinal chlorosis, roll inwards and break easily
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S: |
Whole shoot remains stunted and has a pale green colour
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| Optimal leaf concentrations |
Mg: |
0.30-0.50% |
| (adequate supply) |
S: |
0.30-0.50% |
| Recommendations: |
The amount applied depends on utilisation of the tubers. Largest doses are meant for fresh consumption and seed potatoes. Processing potatoes receive medium and starch potatoes low rates. The range is: 170 – 240 kg Kieserite/ha. |
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Typical Mg deficiency symptoms in potatoes: Interveinal chlorosis which turns into necrosis when exposed to high sunlight.
Severly S deficient potato leaf blades remain yellowish and in time curl upward.
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