CFA Nutrient Management & Application Planning 2

Question 1

A soil test indicates a phosphorus level of 45 ppm in a field intended for corn production. According to typical nutrient management guidelines, this level would be considered:

Accepted Answer

Sufficient, requiring maintenance rates only

Answer

A phosphorus level of 45 ppm is generally in the sufficient range for corn, warranting only maintenance applications rather than build-up rates.

Question 2

When developing a nutrient management plan, the concept of 'realistic yield goal' is important because it:

Accepted Answer

Prevents over-application by setting achievable production targets

Answer

Realistic yield goals prevent over-application of nutrients by basing recommendations on achievable yields based on soil productivity and historical performance.

Question 3

Which of the following best describes 'luxury consumption' in plant nutrition?

Accepted Answer

Plants absorbing more nutrients than needed for maximum growth

Answer

Luxury consumption occurs when plants absorb nutrients in excess of what is needed for maximum growth, which does not translate to additional yield.

Question 4

A farmer reports that crop response to potassium fertilizer has been poor despite low soil K test levels. The MOST likely explanation is:

Accepted Answer

Soil pH is too low, limiting K availability

Answer

Low soil pH can limit potassium availability and uptake even when soil test K levels appear deficient, making pH correction a priority.

Question 5

In split nitrogen applications, a portion of N is applied at planting and the rest during the growing season. The PRIMARY benefit of this approach is:

Accepted Answer

It reduces leaching and volatilization losses

Answer

Split nitrogen applications reduce losses from leaching and volatilization by providing N closer to when the crop needs it, improving nitrogen use efficiency.

CFA Practice Test

CFA Practice Test

CFA Nutrient Management & Application Planning 2