The most important mineral nutrients added to soils in fertilizers are

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Nitrogen, phosphorous, and potassium are known as the primary macronutrients needed in the largest quantities by plants. They are essential ingredients of most fertilizers and play a crucial role in plant growth, development, and reproduction. Calcium and magnesium are also important macronutrients added to the soil in fertilizers, but they are not the most critical ones. The other options listed have minerals that are either not added in large quantities or are not considered essential macronutrients.

The Most Important Mineral Nutrients Added to Soils in Fertilizers