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
- New growth is healthy
- Cold hardiness is improved
- Flower number increases
- Fruit are longer and are generally more intensely coloured
- Fruit may mature earlier and have improved flavour
- Yields are increased
Yara recommended fertilizers for Potassium
YaraMila® 15-15-15
Apple: For orchard establishment, apply .5-1.5 lb YaraMila® 15-15-15/tree. For established low density orchards, apply 5 lbs/tree/year YaraMila® 15-15-15 in split applications at post harvest, and in the spring at flowering, according to variety, soil and tissue samples. Utilizing YaraMila® 15-15-15 provides a balanced nitrogen approach by supplying both nitrate and ammoniacal nitrogen along with fully available Phosphate, soluble Potassium and Sulfur in a homogenous prill. Consult with your agronomist for local recommendations.
Read more about YaraMila® 15-15-15YaraMila® 21-7-14
Apple: For orchard establishment, apply .5-1.5 lb YaraMila® 21-7-14/tree. For established low density orchards, apply 3-5 lbs YaraMila® 21-7-14/tree/year in split applications at post harvest, and in the spring at flowering, according to variety, soil and tissue samples. Utilizing YaraMila® 21-7-14 provides a balanced nitrogen approach by supplying both nitrate and ammoniacal nitrogen along with fully available Phosphate, soluble Potassium and Sulfur in a homogenous prill. Consult with your agronomist for local recommendations.
Read more about YaraMila® 21-7-14YaraVita® MAGPHOS™
Apples: 4 to 6 applications of 1-2 quarts/acre from end of flowering. Repeat applications at 10 to 14 day intervals through color break. Water rate: 50 to 100 gallons/acre.
Read more about YaraVita® MAGPHOS™NUTRA-PHOS Zn-K PLUS
Apple: 5 to 25 lb per acre per application in pre- and post-bloom sprays. Repeat as needed. Apply aerial applications in at least 5 gallons/acre and ground applications in at least 10 gallons/acre; however, when total application gallonage is 25 gallons per acre or less, DO NOT mix more than 1 lb. of this product per gallon of water.
Read more about NUTRA-PHOS Zn-K PLUSSULFATE OF POTASH - GRANULAR 0-0-50
Apple: For established orchards apply up to 175-575 lbs Sulfate of Potash/acre in split applications. Utilizing Sulfate of Potash from Yara for part or all of your potassium needs provides your crop with water soluble potassium along with sulfate sulfur. Consult with your agronomist for local recommendations.
Read more about SULFATE OF POTASH - GRANULAR 0-0-50