Potassium deficiency-Apples

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Nutrients

Apples - Chlorosis

Symptoms
Old leaves bluish-green with scorched margins (brown or grey). Margins may first appear light green and later turn necrotic. Necrosis progresses from the margins inward to the midrib.

Reasons
Potassium deficiency Frost and drought can cause similar symptoms

Apples - Necrosis

Symptoms
Old leaves bluish-green with scorched margins (brown or grey). Margins may first appear light green and later turn necrotic. Necrosis progresses from the margins inward to the midrib.

Reasons
Potassium deficiency Frost and drought can cause 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

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 COMPLEX

Apple: For Best results, For tree age 8-15 years, First application at bud burst - pink bud stage : 1 kg/plant. Second Application at post-harvest stage : 500 g/plant. For tree age 16-25 years, First application at bud burst - pink bud stage : 1.25 kg/plant. Second Application at post-harvest stage : 500 g/plant.