Maize - Growth retardation
Symptoms
The cobs of K-deficiency plants are narrowed and peaked. Grains in the cob tips are only poorly filled.
Causes
Potassium deficiency (cobs at the right side)
Maize - Growth retardation
Symptoms
The cobs of K-deficiency plants are narrowed and peaked. Grains in the cob tips are only poorly filled.
Causes
Potassium deficiency
Maize - Size reduced
Symptoms
Cob size is reduced and filling on cob tip is not complete
Causes
Potassium deficiency on cobs (right)
Maize - Chlorosis
Symptoms
Yellow/bronze stripes and spots occur on the marginal area between the veins. Leaf scorch starting on leaf tips and margins spreads over the leaf blade with progressing deficiency.
Causes
Potassium deficiency
Maize - Chlorosis
Symptoms
Yellow/bronze stripes and spots occur on the marginal area between the veins. Leaf scorch starting on leaf tips and margins spreads over the leaf blade with progressing deficiency.
Causes
Potassium deficiency
Maize - Deformation
Symptoms
The cobs of K-deficiency plants are small and peaked. Grains in the cob tips are only poorly filled.
Causes
Potassium deficiency
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
- Healthy, green foliage
- Better root growth
- Increased yields
Yara recommended fertilisers for Potassium deficiency
YaraVita CROP BOOST
Maize: 5 l/ha at the 4 to 8 leaf stage. Water rate: 30 to 200 l/ha. N.B. Do not spray in slow drying conditions. Alternatively: 2 to 5 l/ha at the 4 to 6 leaf stage. Repeat 10 to 14 days later if necessary. Water rate: 30 to 200 l/ha
Read more about YaraVita CROP BOOSTYaraVita FOLIAR POTASH
Maize: 5 l/ha at the 4 to 8 leaf stage. Water rate: 200 l/ha.
Read more about YaraVita FOLIAR POTASH
