How much fertilizer is needed to supply 1 pound of actual nitrogen per 1,000 square feet if using 20-0-10 fertilizer?

How much fertilizer is needed to supply 1 pound of actual nitrogen per 1,000 square feet if using 20-0-10 fertilizer?

• A. 10 pounds
• B. 5 pounds
• C. 1 pound
• D. 20 pounds

Answer: (B)

To determine how much fertilizer is needed to supply 1 pound of actual nitrogen using a 20-0-10 fertilizer, you first need to understand the makeup of the fertilizer. The numbers in the fertilizer label indicate the percentage of nitrogen, phosphorus, and potassium, respectively. In this case, the first number, 20, represents the nitrogen content, meaning that the fertilizer is 20% nitrogen. To achieve 1 pound of actual nitrogen, you will set up the relationship based on the percentage of nitrogen in the fertilizer. Since the fertilizer is 20% nitrogen, you can calculate how much total fertilizer is required to provide the desired amount of nitrogen. The formula is: Total fertilizer needed = Amount of actual nitrogen desired / Percentage of nitrogen in the fertilizer. In this scenario, you want 1 pound of actual nitrogen and the fertilizer is 20% nitrogen: Total fertilizer needed = 1 pound / 0.20 = 5 pounds. Thus, you would need to apply 5 pounds of the 20-0-10 fertilizer to supply 1 pound of actual nitrogen per 1,000 square feet. This illustrates the importance of understanding the nutrient composition of fertilizers when determining application rates.

To determine how much fertilizer is needed to supply 1 pound of actual nitrogen using a 20-0-10 fertilizer, you first need to understand the makeup of the fertilizer. The numbers in the fertilizer label indicate the percentage of nitrogen, phosphorus, and potassium, respectively. In this case, the first number, 20, represents the nitrogen content, meaning that the fertilizer is 20% nitrogen.

To achieve 1 pound of actual nitrogen, you will set up the relationship based on the percentage of nitrogen in the fertilizer. Since the fertilizer is 20% nitrogen, you can calculate how much total fertilizer is required to provide the desired amount of nitrogen. The formula is:

Total fertilizer needed = Amount of actual nitrogen desired / Percentage of nitrogen in the fertilizer.

In this scenario, you want 1 pound of actual nitrogen and the fertilizer is 20% nitrogen:

Total fertilizer needed = 1 pound / 0.20 = 5 pounds.

Thus, you would need to apply 5 pounds of the 20-0-10 fertilizer to supply 1 pound of actual nitrogen per 1,000 square feet. This illustrates the importance of understanding the nutrient composition of fertilizers when determining application rates.