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Potato Dry Petiole Analysis
The importance of nutrition throughout the season
 | The potato is a hungry crop
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| It can quickly run short of nutrients due to crop demands, dry conditions etc.
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| Nutritional stress means disease pressure
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| It is vitally important to monitor the crop through the season
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| Analysis cuts out the guesswork |
Choosing the right analysis
| Soil analysis is essential for seedbed fertiliser inputs
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| Leaf analysis identifies early nutrient problems
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| After tuber initiation Dry Petiole Analysis provides an accurate assessment of nutritional needs |
Dry Petiole Analysis is proven after 3 years experience in the UK including trials at Askham Bryan College, near York and in independent trials in Holland.
Many leading growers now use the service.
Dry Petiole Analysis
| The technique was developed in the 1970's in North America
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| It is now well established in scientific papers and research
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| It is widely used in USA and Canada by potato growers
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| It has shown to be more reliable test during the bulking phase than either dry leaf or sap juice analysis |
Fast and effective nutrient monitoring
How is it done?
| The 4th petiole is taken from the plant
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| At 20 locations take 3-4 petioles from 3-4 plants |
When to take samples?
| Soil Analysis prior to planting
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| Leaf Analysis 14-21 days after crop emergence
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| 1st Petiole sampling at 10% flower
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| 2nd Petiole sampling 14-21 days later
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| 3rd Petiole sampling 14-21 days later |
What is analyzed?
| Nitrogen, Phosphorus, Potassium, Sulphur, Calcium, Magnesium, Manganese, Boron, Zinc
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| The analysis compares the test level with the established guideline level for each nutrient at that growth stage
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| The result sheet also indicates where treatment may be beneficial |
Summary
Dry petiole analysis...
| Well proven
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| Now enables the crop to be accurately monitored throughout the season
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| Identifies nutrient requirements during the crucial bulking phase
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| Improves tuber size and quality
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| Allows the grower to maximise yield potential
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