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Secondary nutrients

The macronutrients calcium (Ca), magnesium (Mg), and sulphur (S). Calcium (Ca), magnesium (Mg), and sulphur (S) are called secondary nutrient elements because they are essential to plant growth but less frequently deficient than the macro- (primary) nutrients and in greater quantity than the micronutrient elements. sulphur has frequently been called the fourth major nutrient because of the frequency of sulphur deficiencies and the relatively large quantities used by plants.

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  • Part of Speech: noun
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  • Industry/Domain: Plants
  • Category: Horticulture
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