Potassium deficiency made worse by
- Acidic soils (low pH)
- Sandy or light soils (leaching)
- Drought conditions
- High rainfall (leaching)
- or heavy irrigation
- Heavy clay (illite) soils
- Soils with low K reserves
- Magnesium rich soils
Potassium is important for
- Improved yield and quality
- Increased tuber size
- Improved disease resistance
Yara recommended fertilizers for Potassium
YaraVita® MAGPHOS™
Potatoes: To increase tuber size: A minimum of 2 applications of 1-2 quarts/acre during tuber bulking (as soon as first formed tuber are ½" in diameter) and following petiole analysis during tuber bulking. Allow 10 to 14 days between applications. Water rate: 5 to 20 gallons/acre.
Read more about YaraVita® MAGPHOS™SULFATE OF POTASH - GRANULAR 0-0-50
Potatoes: General applications of SOP to supply 1.20-1.5 lb K2O per CWT of potatoes (average extraction) are recommended. Rates may vary with location, variety and potential yields, consult your local agronomist for further details. SOP provides additional sulfur and is low in chlorine, which contributes to enhanced quality of the tubers and does not add to soil salinity.
Read more about SULFATE OF POTASH - GRANULAR 0-0-50