Soybean - Chlorosis
Symptoms
The upper leaves turn yellowish green or chlorotic. Discoloration and necrosis along the leaf margin can occur.
The older leaves remain green for longer periods. Under severe deficiency, all leaves may become yellow, resulting in stunted growth.
Reasons
Sulfur deficiency
Unlike nitrogen, sulfur deficiency appears on younger leaves.
Leaf symptoms resemble those of N or P deficiency while the development of thin, hard and elongated stems is typical for S deficiency.
Soybean - Growth retardation
Symptoms
The upper leaves turn yellowish green or chlorotic. Older leaves remain green for longer periods. Under severe deficiency, all leaves may become yellow, resulting in stunted growth.
Beginning of punctual marginal necrosis is visible as well.
Reasons
Sulphur deficiency
Unlike nitrogen, sulphur deficiency appears on younger leaves first.
Leaf symptoms resemble those of N or P deficiency while the development of thin, hard and elongated stems is typical for S deficiency.
Soybean - Growth retardation
Symptoms
The upper leaves are the first ones turning yellowish green or chlorotic. Under severe deficiency, all leaves may become yellow, resulting in stunted growth.
Necrotic spots appear on the interveinal fields and spread over the leaf blade.
Reasons
Sulphur deficiency
Unlike nitrogen, sulphur deficiency appears on younger leaves first.
Leaf symptoms resemble those of N or P deficiency while the development of thin, hard and elongated stems is typical for S deficiency.
Soybean - Growth retardation
Symptoms
The upper leaves are the first ones turning yellowish green an subsequently yellow. Under severe deficiency, all leaves may become yellow, resulting in stunted growth.
Necrosis occurs as point-shaped spots or marginal necrosis along the leaf edge.
Reasons
Sulphur deficiency
Unlike nitrogen, sulphur deficiency appears on younger leaves first.
Leaf symptoms resemble those of N or P deficiency while the development of thin, hard and elongated stems is typical for S deficiency.
Soybean - Growth retardation
Symptoms
The upper leaves are the first ones turning yellowish green an subsequently yellow.
Necrosis occurs as point-shaped spots or marginal necrosis along the leaf edge.
Reasons
Sulphur deficiency
Unlike nitrogen, sulphur deficiency appears on younger leaves first.
Leaf symptoms resemble those of N or P deficiency while the development of thin, hard and elongated stems is typical for S deficiency.
Sulphur deficiency made worse by
- Acidic soils
- Light, sandy soils (leaching)
- Low organic matter
- Poorly aerated soils (waterlogged soils
- ) Areas with low industrial emissions
Sulfur is important for
- More efficient synthesis of proteins
- Increased vitamin content
- Higher concentration of amino acids