If the numbers 10-6-4 in a fertilizer formula stand for the percentages of certain nutrients, the #6 represents:

If the numbers 10-6-4 in a fertilizer formula stand for the percentages of certain nutrients, the #6 represents:

• A. Phosphorus
• B. Nitrogen
• C. Potassium
• D. Calcium

Answer: (A)

In fertilizer labels, the three numbers show how much of three key nutrients are present, in the order nitrogen, phosphorus, potassium. The second number represents phosphorus, so a 10-6-4 formulation has 6 percent phosphorus. Phosphorus is essential for root development, flowering, and energy transfer within the plant, which is why this value corresponds to phosphorus. The first value is nitrogen (drives leaf growth), the third is potassium (overall health and stress tolerance). Calcium isn’t part of this three-number label, though some blends include it separately.

In fertilizer labels, the three numbers show how much of three key nutrients are present, in the order nitrogen, phosphorus, potassium. The second number represents phosphorus, so a 10-6-4 formulation has 6 percent phosphorus. Phosphorus is essential for root development, flowering, and energy transfer within the plant, which is why this value corresponds to phosphorus. The first value is nitrogen (drives leaf growth), the third is potassium (overall health and stress tolerance). Calcium isn’t part of this three-number label, though some blends include it separately.