On a fertilizer label, what does the middle number (the second value) represent?

On a fertilizer label, what does the middle number (the second value) represent?

• A. Nitrogen
• B. Phosphoric acid
• C. Potash
• D. Lime

Answer: (B)

The middle number on a fertilizer bag shows how much phosphorus is in the form of phosphate. Fertilizers are labeled with three numbers in the N-P-K sequence: nitrogen (first), phosphorus (middle), and potassium (last). Phosphorus (phosphoric acid, often shown as phosphate in the form of P2O5) is important for root development, flower and fruit formation, and overall plant maturity. So the second value specifically represents the phosphate content. Lime isn’t part of this trio; it’s a soil amendment for pH and adds calcium, not a plant macronutrient shown in N-P-K.

The middle number on a fertilizer bag shows how much phosphorus is in the form of phosphate. Fertilizers are labeled with three numbers in the N-P-K sequence: nitrogen (first), phosphorus (middle), and potassium (last). Phosphorus (phosphoric acid, often shown as phosphate in the form of P2O5) is important for root development, flower and fruit formation, and overall plant maturity. So the second value specifically represents the phosphate content. Lime isn’t part of this trio; it’s a soil amendment for pH and adds calcium, not a plant macronutrient shown in N-P-K.