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