Soya - Necrosis
Beginning on older leaves, numerous small brown spots give the plant a mottled appearance.
Furthermore, the blotches expand and coalesce to irregularly shapened, light brown necrosis.
Potassium deficiency
Large amounts of K are necessary for adequate nutrition of soybeans.
Soya - Chlorosis
Interveinal yellow chlorosis, starting on the older leaf margins. The main veins remain green for some time.
Potassium deficiency
Large amounts of K are necessary for adequate nutrition of soybeans.
Soya - Chlorosis
Interveinal yellow chlorosis, starting on the older leaf margins. The main veins remain green for some time.
As the yellowing progresses towards the leaf base, there appear brown marginal necroses.
Potassium deficiency
Large amounts of K are necessary for adequate nutrition of soybeans.
Soya - Chlorosis
Interveinal yellow chlorosis, starting on the older leaf margins. The main veins remain green for some time.
As the yellowing progresses towards the leaf base, there appear brown marginal necroses. They may drie off and form a necrotic seam all along the leaf edge.
Potassium deficiency
Large amounts of K are necessary for adequate nutrition of soybeans.
Soya - Chlorosis
Interveinal yellow chlorosis, starting on the older leaf margins. The main veins remain green for some time.
As the yellowing progresses towards the leaf base, there appear brown necrotic spots in the marginal area.
Potassium deficiency
Large amounts of K are necessary for adequate nutrition of soybeans.
Soya - Chlorosis
Already far advanced chlorosis. The leaf is almost completely bleached, only the midrib and the adjacent area are still green.
As the chlorosis progresses towards the leaf base, there appear brown necrotic spots in the marginal area.
Potassium deficiency
Large amounts of K are necessary for adequate nutrition of soybeans.
Soya - Deformation
Already far advanced chlorosis. The leaf is almost completely bleached, only the leaf base, the midrib and its adjacent area are still green.
As the chlorosis progresses towards the leaf base, there appear brown necrotic spots in the marginal area.
Leaves are bent down.
Potassium deficiency
Large amounts of K are necessary for adequate nutrition of soybeans.
- 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
- Increased activation of enzymes and co-enzyme functions
- Improved protein synthesis
- Better stomatal function, turgor potential
