Phosphorus deficiency-Apples | Yara United States

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Nutrients

Apples - Spongy tissue

Symptoms
Low phosphor concentrations in fruits produce "low temperature breakdown", shown by brown and soft areas within flesh in store. Only at progressed stage damage is visible from the outside. Fruits are squashy and show brown areas on surface.

Reasons
Phosphor deficiency

Apples - Spongy tissue

Symptoms
Low phosphor concentrations in fruits produce "low temperature breakdown", shown by brown and soft areas within flesh in store. At progressed stage damage is visible from the outside. Fruits are brown and squashy.

Reasons
Phosphorus deficiency Visual deficiency symptoms on coffee leaves are rarely observed in the field.

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

Increases fruit size
Gives better colour
Increases firmness
Reduces storage disorders
Increase fruit calcium levels

Yara recommended fertilizers for Phosphorus

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.

YaraMila® 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.

YaraVita® BUD BUILDER™WP

Apples: In the Spring apply 5 to 10 lbs/acre applied at bud burst. Reapply after fruit set during sizing in 10 to 14 day intervals. 5-10 lbs/acre applied post-harvest before leaf senescence. Water rate: minimum 25 gallons/acre. Foliar application of Bud Builder may leave a white residue-deposit on the leaf or crop when applied close to harvest.

Read more about YaraVita® BUD BUILDER™WP

YaraVita® 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.

YaraVita® SENIPHOS™

Apples: 3 to 8 applications of 1-4 quarts/acre at 10 to 14 day intervals commencing at petal fall. One or two applications (7 days apart) should be applied alone once the fruit has started to change color, normally 2 to 3 weeks before harvest. Water rate: 50 to 100 gallons/acre.

NUTRA-PHOS CALZINC

Apple: 5 to 25 lb per acre per application. 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.

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.