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Answer:

Primary nutrients are nutrients that are required by plants in larger quantities than other nutrients. The primary nutrients include nitrogen (N), phosphorous (P), and potassium (K)

Explanation:

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Answer:

soil

Explanation:

Soil is a major source of nutrients needed by plants for growth. The three main nutrients are nitrogen (N), phosphorus (P) and potassium (K). Together they make up the trio known as NPK. Other important nutrients are calcium, magnesium and sulfur.