Secondary Nutrients

Sulphur (S)

  • Studies show that additional Sulphur increases yield, particularly in coarse upland soils. Sulphur is the most widely used secondary nutrient. Plants require S as much of it as they require P.  Sulphur is vital for plant growth, as well as protein and seed development. It is sometimes called as “the fourth macronutrient”.

Magnesium (Mg)

  • Magnesium is a component of chlorophyll. Deficiency appears first as a yellowing of older, lower leafs.

Calcium (Ca)

  • Calcium stimulates the formation of roots and leaves, and is essential for cell wall formation.
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