Benchmarking Nitrogen Use Efficiency (NUE) quiz
Watch the webinar recording first on
, then take this quiz. Certified crop advisors who receive passing scores of 3 or higher are eligible to receive 1 CEU in Nutrient Management.
What is Discovery Farms NUE research finding as the relationship between Nitrogen supplied and yield?
A linear relationship, more N supplied means more yield.
We have seen no clear relationship, more N supplied does not always equal more yield.
As more N is applied, yield increases significantly at first, but then tapers off.
What does it mean to have a low Nitrogen Use Efficiency?
Means we either have a low yield compared to the Nitrogen applied or a high Nitrogen rate relative to yield.
Means you have a high yield and a low Nitrogen rate.
Means your yield goals were too low.
What is one way to increase efficiencies of fields doing “OK” or just below the median benchmark?
Increase your N rates to achieve your yield goal
Plant shorter day corn to improve N efficiency.
Apply a majority of your N in the spring.
Test out small reductions (10-20%) of N applications.
What does it mean to have a Partial Nutrient Balance (PNB) greater than 1?
An excess amount of N was applied to the field.
The field is exceeding yield goals and N credits were not considered.
More N is being removed from the field than that being applied. Continuously high NUE on this field puts you at risk for mining your soil for N and decreasing organic matter.
What is the value of having a zero N plot in a field? Choose the 3 best options.
To quantify how much N is supplied by the soil.
It is impossible to take NUE measurements without a zero N plot.
Zero N plots can predict yield potentials.
Shows how much N is actually being used by the crop.
Measures he true economic value of the N applied in that year.
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