Complete nutrition programme

Making sure your potatoes are fully supplied with all the nutrients they require is the best way to improve crop yield and tuber quality

How can foliar nutrients improve potato yield?

  • The potato plant is inefficient at utilising soil nutrients, therefore additional nutrition in the foliar form is an ideal way of getting nutrition into the leaf.
  • Potatoes are highly responsive to foliar phosphorus, marketable yield and tuber size can be improved by applications during bulking.
  • When applied at potato tuber initiation P increases the number of tubers set. When applied during bulking it increases tuber size.
  • Low levels of magnesium during bulking stage will reduce the starch content of tubers.
  • Recent trials work carried out by ADAS confirms that foliar phosphate, when applied after tuber initiation, has a positive effect on tuber yields by increasing the tuber size.

Mg

Magnesium is essential for photosynthesis and starch metabolism

P

Phosphate provides the energy for all plant metabolic functions.

K

Potassium is needed to move carbohydrates from the leaves to tubers

  • Magnesium is essential for chlorophyll production as it is present in the center of each chlorophyll molecule. Magnesium is needed during tuber bulking and if supply is restricted tuber size and yield will both be reduced by up to 15% in severe cases.
  • Phosphorus provides the energy for all plant metabolic functions. When applied at potato tuber initiation P increases the number of tubers set. When applied during bulking it increases tuber size.
  • Potassium is needed for the movement of carbohydrates from the leaves to the tubers and so contributes to increased yield. Too much K, especially in the chloride form, can reduce potato specific gravity.

More Tubers

Phosphate applied at tuber innitiation increases tuber numbers

Bigger Tubers

Phosphate applied during tuber bulking increases tuber size

Why is potato quality so important?

Listen to potato grower Jimmy Dagg from Crailing Tofts Potatoes near Kelso in the Scottish Borders tell us why potato quality is so important and why YaraLiva Tropicote Calcium Nitrate fertiliser is his first choice when it comes to spreadability, tracability and reliability.

How does nutrition improve tuber quality?

  • Calcium increases cell wall strength which reduces bruising severity, improves  tuber skin finish and improves your crop's storage quality.
  • Calcium also helps plants resist pathogen infection so reduces infection levels and disease severity.

Ca

Calcium is the key nutrient for tuber quality, it strengthens cell walls which improves many aspects of tuber quality

B

Boron is involved in stabilising cell membranes and cell walls which can lead to less bruising during handling

  • Calcium is the key nutrient for tuber quality but needs to be delivered in a water-soluble form for potatoes to take full advantage of its benefits. Calcium strengthens cell walls which improves your crop's storage quality and decreases infection from plant pathogens.
  • Boron works together with calcium and like calcium, boron is involved in stabilising cell membranes and cell walls which can lead to less bruising during handling.

75%

improvement in skin finish

40%

reduction in tuber bruising

75%

reduction in internal spots

Can you afford not to apply calcium?

  • Trials have consistently shown calcium can improve tuber skin finish by up to 70%, reduce bruising by around 40% and show a 75% reduction of internal disorders such as internal rust spot.
  • Tuber calcium levels can only be increased by soil uptake not foliar.  It is not possible for the plant to move calcium from leaves to tubers.
  • Solubility is key to calcium uptake.  Calcium nitrate is the most soluble form of calcium and the only fully available calcium fertiliser.

99.5%

of calcium in the soil is in a form that cannot be taken up by plants and is unavailable

100%

of calcium nitrate dissolves in water making it the only fully soluble calcium fertiliser

How soluble is YaraLiva Tropicote?

Potatoes can only use calcium when it is delivered in a water-soluble form.  YaraLiva Tropicote Calcium Nitrate is the only fully soluble calcium fertiliser. Other forms of calcium are much less soluble than calcium nitrate so they are unable to supply sufficient calcium to meet plant needs.  See the difference for yourself.

Why I use YaraLiva Tropicote

Potato grower Thomas Marshall from County Antrim in Northern Ireland tells Yara area manager Chloe Kyle why he uses YaraLiva Tropicote to improve the potato quality.

Where can I buy Yara fertilisers ?

Where can I buy Yara fertilisers ?

Yara supply our solid and liquid fertilisers and micronutrients through a network of local suppliers  Use our interactive map to locate your nearest suppliers.

Find a local supplier

Top Potato webinar - can the right nutrition help suppress tuber disorders?

Top Potato webinar - can the right nutrition help suppress tuber disorders?

With potato quality being so important it's vital to give the crop the best nutrition to help supress tuber disorders. Join our webinar to help answer your questions. Eva Ross of Yara is joined by Mark Tucker and Tom Decamp to discuss how effective nutrition helps control disease in potatoes.

Register for Top Potato webinar now >

Related publications

Here is an infographic to download as a useful reminder

Potato agronomy and fertiliser advice
Potato agronomy and fertiliser advice

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