Nutrients

N Nitrogen
P Phosphorus
K Potassium
Mg Magnesium
Ca Calcium
S Sulphur
B Boron
Cu Copper
Fe Iron
Mn Manganese
Mo Molybdenum
Zn Zinc
Previous Next

Potatoes - Chlorosis

Symptoms
The pale green/yellow leaves (left) are reduced in size and growth may be stunted. Often seen on younger leaves first.

Reasons
Severe Sulphur deficiency. Nitrogen deficiency, nightfrosts, water shortage or heavy metal toxicity can cause similar symptoms. May occur in patches due to soil type.

Potatoes - Growth retardation

Symptoms
The pale green leaves (left) are reduced in size and growth is stunted. Symptoms often seen on younger leaves first.

Reasons
Sulphur deficiency. Nitrogen deficiency, nightfrosts, water shortage or heavy metal toxicity can cause similar symptoms.

Potatoes - Chlorosis

Symptoms
The entire foliage - beginning at the younger leaves - turns pale green. Additionally, a purple tint may occur on stems, leaf stalks and leaf edges. The veins are often lighter than blade.

Reasons
Sulphur deficiency. Nitrogen deficiency, nightfrosts, water shortage or heavy metal toxicity can cause similar symptoms.

Potatoes - Chlorosis

Symptoms
Symptoms start on young leaves. They are pale yellow and smaller than normal. The youngest leaves are bright yellow.

Reasons
Sulphur deficiency on leaves Nitrogen deficiency produces similar symptoms but starts on older leaves.

Sulphur deficiency made worse by

  • Acidic soils
  • Light, sandy soils (leaching)
  • Low organic matter
  • Poorly aerated soils (waterlogged soils
  • ) Areas with low industrial emissions

Sulphur is important for

  • Better crop development
  • Improved yield

Yara recommended fertilisers for Sulphur

YaraVita THIOTRAC 300

YaraVita THIOTRAC 300

Potatoes: 5 l/ha one week after 100% emergence. Repeat applications may be necessary at 10 to 14 day intervals. Also, 5 l/ha following petiole analysis during tuber bulking. Water rate: 200 l/ha.

Read more about YaraVita THIOTRAC 300

Other recommended products

YaraMila COMPLEX
YaraMila COMPLEX
Potatoes: Up to 1250 kg/ha in the seedbed. Exact recommendation depends on soil analysis and variety requirements. Refer to your local Yara area manager for detailed recommendation.