Pomme de terre - Chlorosis
Symptômes
Plants (right) are stunted and leaves show a uniform chlorotic pale green / yellow colouration
Raisons
Nitrogen deficiency
Sulphur deficiency, root parasites (eg PCN), deep drilling of tubers, nightfrosts, water shortage or heavy metal toxicity can cause similar symptoms.
Pomme de terre - Chlorosis
Symptômes
Leaves (right) are stunted and leaves show a uniform chlorotic pale green/yellow colouration
Raisons
Nitrogen deficiency
Sulphur deficiency, root parasites (eg PCN), deep drilling of tubers, nightfrosts, water shortage or heavy metal toxicity can cause similar symptoms.
Pomme de terre - Growth retardation
Symptômes
Plants on the left side show uniform pale green leaves and stunted growth. Older leaves usually affected first and these then turn yellow and shed early.
Raisons
Nitrogen deficiency.
Sulphur deficiency, root parasites (eg PCN), deep drilling of tubers, nightfrosts, water shortage or heavy metal toxicity can cause similar symptoms.
Often seen as patches due to poor fertiliser application or soil type
Nitrogen deficiency aggravé par
- Low or high pH soils
- Sandy or light soils (leaching
- ) Low organic matter
- Drought conditions
- High rainfall (leaching) or heavy irrigation
- Addition or high levels of non-decomposed organic matter/manure (eg straw)
- Fast growing crops
Azote est important pour
- Better crop development
- Improved yield
Yara a recommandé cet engrais pour Azote
YaraLiva TROPICOTE
Potatoes: 375 to 500 kg/ha at tuber initiation. Exact recommendation depends on soil analysis and variety requirements. Refer to your local Yara area manager for detailed recommendation.
En savoir plus YaraLiva TROPICOTEYaraVita CROPLIFT PRO
Potatoes: 2.5 to 5 kg/ha. Repeat at 10 to 14 day intervals as necessary. Water rate: 200 l/ha.
En savoir plus YaraVita CROPLIFT PROYaraVita SAFE-N 300
Potatoes: 10 to 20 l/ha before tuber set and at onset of flowering. Also, apply 10 to 20 l/ha, if required, following petiole analysis. Water rate: 100 to 200 l/ha.
En savoir plus YaraVita SAFE-N 300CHAFER NUFOL 20
Potatoes: Suitable for foliar application. Apply up to 2x25 l/ha from early to mid tuber bulking. Refer to your local Yara area manager for detailed recommendation.
En savoir plus CHAFER NUFOL 20
