FREE Agronomy Question and Answers 2026
Get ready for your FREE Agronomy Question and Answers certification. Practice questions with step-by-step answer explanations and instant scoring. 📚
In order to grow, which of the following crops would need the most phosphorus?
Correct answer:
Alfalfa - 6 dry tons per acre
Lacustrine soils are those that have been laid down by one of these:
Explanation:
Lacustrine soils are those that have been deposited in lake beds after having been transported by glaciers, rivers, and streams.
What type of soil is most prone to experience nitrogen leaching?
Explanation:
While heavy, poorly drained soils may lose nitrogen through denitrification, sandy soils may lose nitrogen through leaching.
Which of the following insecticides can be used on organically grown crops?
Explanation:
The USDA and other authorities agree that many Bt varieties and products are suitable for use on organic farms. But be aware that there may still be some negative consequences. (Valium) Unlike chemical pesticides, it has no connection to cancer. In addition, following prolonged dietary exposure, it doesn't appear to have any negative consequences.
After a preemergence application, rainfall is required to:
Correct answer: ,br> move the herbicide into the weed germination zone
Which of the following leaves is most crucial to grain fill in the production of rice?
Explanation:
The flag leaf is the last to appear on rice plants, signaling the change from crop growth to grain production. This leaf is crucial for yield potential because it produces the majority of the carbohydrates required for grain filling through photosynthesis.
An annual plant is one that:
Correct answer:
a plant that grows, flowers and reproduces in one growing season
Important: The Agronomy exam covers multiple domains. Create a study schedule that allocates more time to unfamiliar topics while maintaining review of strong areas.
- ✓Confirm your exam appointment and location
- ✓Bring required identification documents
- ✓Arrive 30 minutes early to check in
- ✓Read each question carefully before answering
- ✓Flag difficult questions and return to them later
- ✓Manage your time — don't spend too long on one question
- ✓Review flagged questions before submitting
Sample Agronomy Practice Questions
Try these questions from our free Agronomy practice tests. The correct answer and an explanation follow each question.
What is the main form of nitrogen taken up by most crops from the soil?
- A. Urea
- B. Ammonium and nitrate
- C. Organic nitrogen
- D. Dinitrogen gas
Answer: B. Ammonium and nitrate
Most crops absorb nitrogen primarily as ammonium (NH4+) and nitrate (NO3-) ions from the soil solution.
What is the Universal Soil Loss Equation (USLE) used to estimate?
- A. Annual crop yield potential
- B. Average annual soil erosion from rainfall and runoff on cropland
- C. Irrigation water requirements
- D. Soil organic matter accumulation rates
Answer: B. Average annual soil erosion from rainfall and runoff on cropland
The USLE estimates average annual soil loss (tons/acre/year) from sheet and rill erosion on cropland based on rainfall, soil erodibility, slope, and management factors.
What is evapotranspiration (ET) used for in irrigation management?
- A. Measuring rainfall totals
- B. Estimating crop water use to schedule irrigation timing and amounts
- C. Calculating herbicide dilution rates
- D. Predicting frost dates
Answer: B. Estimating crop water use to schedule irrigation timing and amounts
ET estimates the combined water loss from soil evaporation and plant transpiration, providing the basis for scheduling irrigation to replace crop water use.
Among the below, which is a commercial crop?
- A. Bajra
- B. Paddy
- C. Cotton
- D. Jowar
Answer: C. Cotton
Commercial crops are those grown primarily for sale in the market rather than for direct consumption by the farmer or their family. Cotton is a prime example of a commercial crop, cultivated extensively for its fiber, which serves as a crucial raw material for the textile industry. Bajra, paddy (rice), and jowar (sorghum) are typically considered food crops, though they can also be sold commercially.
Agronomy Practice Test Questions
Prepare for the Agronomy exam with our free practice test modules. Each quiz covers key topics to help you pass on your first try.
Agronomy Crop Production and Management
Agronomy Exam Questions covering Crop Production and Management. Master Agronomy Test concepts for certification prep.
Agronomy Irrigation and Water Management
Free Agronomy Practice Test featuring Irrigation and Water Management. Improve your Agronomy Exam score with mock test prep.
Agronomy Pest and Weed Management
Agronomy Mock Exam on Pest and Weed Management. Agronomy Study Guide questions to pass on your first try.
Agronomy Plant Genetics and Breeding
Agronomy Test Prep for Plant Genetics and Breeding. Practice Agronomy Quiz questions and boost your score.
Agronomy Soil Science and Fertility
Agronomy Questions and Answers on Soil Science and Fertility. Free Agronomy practice for exam readiness.
Agronomy: Pros and Cons
- +Agronomy credential is recognized by employers and industry professionals
- +Higher earning potential compared to non-credentialed peers
- +Expanded career opportunities and professional advancement
- +Structured learning path builds comprehensive knowledge
- +Professional development that stays current with industry standards
- −Preparation requires significant time and study commitment
- −Associated costs for exams, materials, and renewal fees
- −Continuing education needed to maintain credentials
- −Competition for advanced positions can be challenging
- −Requirements and standards may vary by state or region
Pros and Cons at a Glance
| Pros | Cons |
|---|---|
| Agronomy credential is recognized by employers and industry professionals | Preparation requires significant time and study commitment |
| Higher earning potential compared to non-credentialed peers | Associated costs for exams, materials, and renewal fees |
| Expanded career opportunities and professional advancement | Continuing education needed to maintain credentials |
| Structured learning path builds comprehensive knowledge | Competition for advanced positions can be challenging |
| Professional development that stays current with industry standards | Requirements and standards may vary by state or region |
About the Author
Certified Professional Development Expert & Niche Certification Advisor
University of Pennsylvania Graduate School of EducationDr. Alexandra Kim holds a PhD in Professional Studies from the University of Pennsylvania and is a Certified Professional in Learning and Performance (CPLP) and Certified Professional in Talent Development (CPTD). With 17 years of corporate training and professional certification advisory experience, she helps professionals navigate specialized, emerging, and cross-industry certification programs.