Symptoms
Shoots are upright and thin with dull, dark green leaves. Margins of leaves are cupped upward.
Growth is stunted.
Reasons
Phosphorus deficiency (left)
Potatoes - Growth retardation
Symptoms
Lateral root development is inhibited. Tuber yield will be reduced.
Reasons
Phosphorus deficiency (right)
Phosphorus deficiency made worse by
Acidic or very alkaline (calcareaus) soils
Low organic matter
Cold or wet conditions
Crops with a poorly developed root system
Soils with low P reserves
Soils with a high phosphate capacity
Iron rich soils
Phosphorus is important for
Increased number of tubers
Produces tubers of uniform size
Boosts bulking and increases the yield of tubers
Increases tuber dry matter content and starch levels
Improves storage potential of tubers and reduces storage diseases
Yara recommended fertilizers for Phosphorus
YaraMila COMPLEX
Potatoes:
For best results,
Apply YaraMila Complex:
First application@ 25 kg/acre, at the time of sowing
Second application @ 25kg/acre, 25-30 days after sowing