Maïs - Growth retardation
Symptômes
The cobs of K-deficiency plants are narrowed and peaked. Grains in the cob tips are only poorly filled.
Raisons
Potassium deficiency (cobs at the right side)
Maïs - Growth retardation
Symptômes
The cobs of K-deficiency plants are narrowed and peaked. Grains in the cob tips are only poorly filled.
Raisons
Potassium deficiency
Maïs - Size reduced
Symptômes
Cob size is reduced and filling on cob tip is not complete
Raisons
Potassium deficiency on cobs (right)
Maïs - Chlorosis
Symptômes
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.
Raisons
Potassium deficiency
Maïs - Chlorosis
Symptômes
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.
Raisons
Potassium deficiency
Maïs - Deformation
Symptômes
The cobs of K-deficiency plants are small and peaked. Grains in the cob tips are only poorly filled.
Raisons
Potassium deficiency
Potassium deficiency aggravé par
- 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 est important pour
- Healthy, green foliage
- Better root growth
- Increased yields
Yara a recommandé cet engrais pour Potassium
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
En savoir plus YaraVita CROP BOOSTYaraVita FOLIAR POTASH
Maize: 5 l/ha at the 4 to 8 leaf stage. Water rate: 200 l/ha.
En savoir plus YaraVita FOLIAR POTASH
