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Nutrient Management & Application Planning Flashcards

7 cards from real CFA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. When applying fertilizer to sloped fields, the GREATEST risk of nutrient loss is associated with:

    Answer: Phosphorus runoff and erosion on steep slopes

    Phosphorus binds to soil particles and is lost primarily through erosion and surface runoff, making steep slopes a significant P loss risk.

  2. In a corn-soybean rotation, nitrogen credit from the soybean crop is given because:

    Answer: Soybeans fix atmospheric nitrogen through rhizobial symbiosis, reducing corn N needs

    Soybeans fix atmospheric nitrogen through symbiosis with Bradyrhizobium bacteria, and the N remaining in the system after harvest reduces the nitrogen requirement for the following corn crop.

  3. Controlled-release fertilizers (CRFs) are advantageous in nutrient management plans primarily because they:

    Answer: Match nutrient release timing to crop uptake patterns, reducing losses

    Controlled-release fertilizers synchronize nutrient availability with crop demand, reducing leaching and volatilization losses while maintaining productivity.

  4. A soil sample is collected from a field with a history of heavy manure applications. You would MOST likely expect to find:

    Answer: Elevated phosphorus and potassium levels

    Fields with long-term heavy manure applications typically accumulate elevated phosphorus and potassium levels that must be accounted for in nutrient management planning.

  5. The 4R Nutrient Stewardship framework stands for applying the Right nutrient source at the Right rate at the Right time in the Right:

    Answer: Place

    The 4R framework includes Right Source, Right Rate, Right Time, and Right Place, with placement being critical to nutrient use efficiency and environmental protection.

  6. Which soil test method for phosphorus is most commonly recommended in the Midwest United States?

    Answer: Bray P-1 extraction

    The Bray P-1 extraction method is most commonly used and recommended for phosphorus testing in slightly acid to neutral Midwestern soils.

  7. When a nutrient management plan specifies a pre-plant soil nitrate test (PSNT), the sampling depth is typically:

    Answer: 0–12 inches to capture mobile nitrate in the root zone

    The pre-plant soil nitrate test typically uses a 0–12 inch sampling depth to capture the mobile nitrate that has accumulated in the upper root zone.