2012 · Q61
The macro-nutrients provided by inorganic fertilizers are
General KnowledgeChemistry
- Acarbon, iron and boron
- Bmagnesium, manganese and sulphur
- Cmagnesium, zinc and iron
- Dnitrogen, phosphorus and potassium
Explanation
The primary macro-nutrients in inorganic (NPK) fertilizers are nitrogen, phosphorus and potassium.