Reddish to purplish colouring on the underside of the leaves
Your crop is Sulphur deficient.
- Sulphur is essential for synthesis of sulphur-containing amino acids and is therefore vital for protein synthesis.
- Sulphur aids in seed production and producing the chlorophyll necessary for plants to carry out photosynthesis.
- Sulphur aids in increased nitrogen use efficiency.
- Sulphur is a component of vitamin B1 (particularly for cereals and legumes).
- Important for production of innate plant defence substances (phytoalexines, glutathione).
- Sulphur fertilization is increasingly common because higher yielding crops are taking up and removing more S from soil as harvested products.
- Form used by plants: SO4+2 (sulphate)
- Both solution- and adsorbed- sulphate are the forms available for plant use.
