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Question 1
Which element of the 4R Nutrient Stewardship framework addresses applying fertilizer where crop roots can best access it while minimizing environmental loss?
Correct Answer:
Right Place
Question 2
A Mehlich-3 soil test returns 18 ppm P on a silt loam with a target of 25 ppm for corn. If plow-layer bulk density is 1.3 g/cm3 to 6 inches, approximately how many lb P2O5/acre are needed just to build the soil test by 7 ppm (using the common rule of ~9 lb P2O5 per 1 ppm build)?
Correct Answer:
90 lb P2O5/acre (approximately)
Question 3
Which nitrogen source carries the highest risk of ammonia volatilization when surface-applied to a warm, moist, high-pH soil with crop residue?
Correct Answer:
Urea without a urease inhibitor
Question 4
What is the primary agronomic reason to split-apply nitrogen on corn rather than apply the full rate pre-plant?
Correct Answer:
To synchronize N availability with peak crop demand and reduce leaching/denitrification losses
Question 5
A tissue test from V6 corn shows K at 1.4% (sufficient range 1.7-2.5%) on a CEC 15 cmol/kg silt loam with K soil test 140 ppm. Which management decision is most defensible?
Correct Answer:
Investigate root restriction, compaction, and dry topsoil before fertilizing - soil test is adequate and K uptake is diffusion-limited
Question 1
Exam overview

About this Exam

Prepare with the CPAg Practice Questions - Certified Professional Agronomist Exam practice quiz. This question bank includes 100 questions covering corn, soil, field, acre, and crop. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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CPAg Practice Questions - Certified Professional Agronomist Exam

This practice set contains 100 questions from the matching question bank and focuses on corn, soil, field, acre, and crop. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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