Raspberries - Growth retardation
Symptoms
Interveinal yellowing and subsequent leaf scorch starting from mature leaves. Severely stunted growth.
Causes
Potassium deficiency
Raspberries have a relatively high demand of Potassium. An imbalanced nutrient supply with K, Mg and Ca may induce K deficiency. Its availibility can be restricted in clay soils.
The suggested K level in leaf tissue is 1.5-3.0%.
Raspberries - Chlorosis
Symptoms
Interveinal yellowing and subsequent leaf scorch starting from mature leaves. Severely stunted growth.
Causes
Potassium deficiency
Raspberries have a relatively high demand of Potassium. An imbalanced nutrient supply with K, Mg and Ca may induce K deficiency. Its availibility can be restricted in clay soils.
The suggested K level in leaf tissue is 1.5-3.0%.
Raspberries - Chlorosis
Symptoms
Interveinal yellowing and subsequent leaf scorch starting from mature leaves. Severely stunted growth.
Causes
Potassium deficiency
Raspberries have a relatively high demand of Potassium. An imbalanced nutrient supply with K, Mg and Ca may induce K deficiency. Its availibility can be restricted in clay soils.
The suggested K level in leaf tissue is 1.5-3.0%.
Raspberries - Growth retardation
Symptoms
Interveinal yellowing and subsequent leaf scorch starting from mature leaves. Severely stunted growth.
Causes
Potassium deficiency
Raspberries have a relatively high demand of Potassium. An imbalanced nutrient supply with K, Mg and Ca may induce K deficiency. Its availibility can be restricted in clay soils.
The suggested K level in leaf tissue is 1.5-3.0%.
Raspberries - Chlorosis
Symptoms
Interveinal yellowing and subsequent leaf scorch starting from mature leaves. Severely stunted growth.
Causes
Potassium deficiency
Raspberries have a relatively high demand of Potassium. An imbalanced nutrient supply with K, Mg and Ca may induce K deficiency. Its availibility can be restricted in clay soils.
The suggested K level in leaf tissue is 1.5-3.0%.
Potassium deficiency vs. healthy plant 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
- Healthy green foliage
- Important for fruit size, development and yield
- Reduction of fungal diseases
- Improved sugar content of berries
- Improved maturation of berries
Yara recommended fertilisers for Potassium deficiency
YaraVita FOLIAR POTASH
Raspberry: 5 l/ha at green bud. Water rate: 200-500 l/ha.
Read more about YaraVita FOLIAR POTASH
