Potassium deficiency-Strawberry

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Nutrients

Strawberry - Necrosis

Symptoms
As a first symptom margins of mature leaves turn brown and dry. The browning progresses inwardly between the veins.

Reasons
Potassium Deficiency. Potassium deficient leaves contain less than 0.5% K. Magnesium deficiency and salt burn can produce similar symptoms.

Strawberry - Necrosis

Symptoms
As a first symptom margins of mature leaves turn brown and dry. The browning progresses inwardly between the veins. Almost at the same time the leaf base including the midrib and petiole darkens.

Reasons
Potassium deficiency Potassium deficient leaves contain less than 0.5% K. Magnesium deficiency and salt burn can produce similar symptoms.

Strawberry - Chlorosis

Symptoms
As a first symptom margins of mature leaves turn brown and dry. Light and dark brown sunken spots spread over the leaf blade. Interveinal chlorosis occurs.

Reasons
Potassium Deficiency. Potassium deficient leaves contain less than 0.5% K. Magnesium deficiency and salt burn can produce similar symptoms.

Strawberry - Chlorosis

Symptoms
As a first symptom margins of mature leaves turn brown and dry. Light and dark brown sunken spots spread over the leaf blade. Interveinal chlorosis occurs.

Reasons
Potassium Deficiency. Potassium deficient leaves contain less than 0.5% K. Magnesium deficiency and salt burn can produce similar symptoms.

Strawberry - Necrosis

Symptoms
With severe K deficiency the petiole and the leaf tissue at the leaf base become necrotic. The area adjacent to the midrib shows irregular chlorosis.

Reasons
Severe potassium deficiency Potassium deficient leaves contain less than 0.5% K. Magnesium deficiency and salt burn can produce similar symptoms.

Strawberry - Necrosis

Symptoms
As a first symptom margins of mature leaves turn brown and dry. Light and dark brown sunken spots spread over the leaf blade.

Reasons
Potassium Deficiency. Potassium deficient leaves contain less than 0.5% K. Magnesium deficiency and salt burn can produce similar symptoms.

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 crop development
Increased yield
Improved fruit quality

Yara recommended fertilizers for Potassium

YaraTera KRISTA K PLUS

Strawberry: For fertigation, use 17-19kg in 200L stock solution, Ec = 1.0 (transplanting phase), 1.5 (generative phase), 1.6-2.2 (mature phase, depending on local conditions)

YaraTera KRISTA MKP

Strawberry:For fertigation, use 5.5-6.5kg in 200L stock solution, Ec = 1.0 (transplanting phase), 1.5 (generative phase), 1.6-2.2 (mature phase, depending on local conditions)