Free Certified Crop Adviser (CCA) Exam Questions and Answers
Certified Crop Adviser (CCA) is an Agriculture and Food Safety certification exam. This page has free practice questions for it with answers and explanations, set out the way the real exam asks them, plus a timed practice test that scores you against the pass mark.
Candidates comparing Certified Crop Adviser (CCA) exam dumps, ExamTopics and other practice tests use this page for the answers and explanations behind each question. Download the free PDF, then sit the timed exam simulation before booking with Agriculture and Food Safety.
Last updated: September 30, 2026
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- First 10, with answers
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- 130 mins · 70%
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- Multiple choice
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Question #1
A corn crop needs 180 lb N/ac. The preceding soybean crop provides a 40 lb N/ac credit. How many pounds of urea (46% N) per acre must be applied?
Correct answer: C
Explanation
Net N need is 180 - 40 = 140 lb; 140 / 0.46 = 304 lb urea. 391 forgets the soybean credit.
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Question #2
Which nitrogen source is most prone to ammonia volatilization loss when broadcast on the surface of a residue-covered, high-pH no-till field?
Correct answer: B
Explanation
Urea is hydrolyzed by urease to ammonium and ammonia, which volatilizes at high pH on the surface. The nitrate sources contain no urea or ammonium.
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Question #3
Soybeans on a calcareous, high-pH soil show interveinal chlorosis on the youngest leaves while veins stay green. Which deficiency is most likely?
Correct answer: D
Explanation
Iron is immobile in the plant so symptoms appear on new growth, and is poorly available at high pH. N, K and Mg deficiencies show first on older leaves.
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Question #4
Corn leaves show yellowing then browning along the margins of the older lower leaves, with the midrib staying green. Which nutrient is most likely deficient?
Correct answer: B
Explanation
Marginal firing of older leaves is classic potassium deficiency; nitrogen deficiency yellows the leaf in a V down the midrib.
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Question #5
On a sandy soil, which two practices best reduce nitrate leaching losses? Choose two.
Select 2 answers.
Correct answer: A, D
Explanation
Matching N supply to crop demand and keeping N as ammonium longer reduces leachable nitrate. Fall application and heavy irrigation increase losses.
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Question #6
Soybeans in a field with soil pH 5.0 have stunted, thickened roots. Which problem is the most likely cause?
Correct answer: D
Explanation
Below about pH 5.5 aluminum becomes soluble and damages root growth. Liming is the correction.
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Question #7
Which soil texture generally has the greatest plant-available water holding capacity?
Correct answer: B
Explanation
Silt loams have many medium pores that hold water at field capacity but release it before the wilting point. Sands drain too freely.
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Question #8
A 3 ft root zone has an available water capacity of 1.8 in/ft. Irrigation is scheduled at 50% depletion and crop ET is 0.30 in/day. About how many days between irrigations?
Correct answer: C
Explanation
Total AWC = 5.4 in; 50% allowed = 2.7 in; 2.7 / 0.30 = 9 days. 18 days ignores the management allowed depletion.
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Question #9
In the RUSLE equation A = R K LS C P, which factor changes most directly when a grower moves from conventional tillage to no-till with a cover crop?
Correct answer: A
Explanation
C represents crop cover and residue management. R, K and LS are climate and landscape factors not changed by management.
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Question #10
A sodic soil (high exchangeable sodium, low salt content) has a dispersed structure and poor infiltration. Which amendment is most appropriate?
Correct answer: B
Explanation
Gypsum supplies calcium to displace sodium, which is then leached, without raising pH. Dolomitic lime would add to an already high pH.
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FAQ
- Q1: What is the Certified Crop Advisor (CCA) exam?
- A: Certified Crop Advisor (CCA) is a professional examination offered by Agriculture and Food Safety.
- Q2: Are there practice questions for Certified Crop Advisor (CCA)?
- A: The Certified Crop Advisor (CCA) question bank is still being written. The rest of the catalogue is free to read while you wait — the first ten questions of every exam, answers included, with no account needed.
- Q3: How should I prepare for Certified Crop Advisor (CCA)?
- A: Start from the official Agriculture and Food Safety exam objectives, which define what is actually tested, and practise against questions written to them rather than to a syllabus someone has guessed at.