To achieve a targeted nitrogen rate on a 1,000-square-foot area, which steps should you follow when applying fertilizer?

• A. Apply the fertilizer after heavy rainfall to improve absorption.
• B. Use only the smallest bag size and adjust by guessing.
• C. Calculate the bag's nitrogen content, determine how many bags are needed for the target rate per 1,000 sq ft, and calibrate the spreader with a test pass to reach that rate.
• D. Apply the fertilizer uniformly across the entire area by weight without calibration.

Answer: (C)

Delivering a targeted nitrogen rate means converting the desired pounds of nitrogen per area into an exact amount of fertilizer product and confirming that amount with a proper spreader calibration. Start with the bag’s labeled nitrogen content (N%). Multiply the bag weight by that percentage to get how many pounds of nitrogen are in one bag. Decide the target rate in pounds of nitrogen per 1,000 square feet, and for a 1,000-square-foot area that target equals the rate value itself. Determine how much fertilizer product is needed by relating the total nitrogen required to the nitrogen per bag, then plan how many bags to use. But numbers alone aren’t enough until your spreader is calibrated: perform a test pass over a known area to see exactly how much product is released per unit area, then adjust the spreader setting until the release matches the target rate. Only with this calibration and calculation can you apply evenly and avoid waste or nutrient runoff. The other options skip these crucial steps or rely on unsafe timing or guessing, which won’t reliably hit the intended rate.