FREE Agronomy Question and Answers 2026 — 🆕 Free Exam Questions

In order to grow, which of the following crops would need the most phosphorus?

<label class="wq_answerTxtCtr">Alfalfa - 6 dry tons per acre</label>

<label class="wq_answerTxtCtr">Wheat - grain + straw (70 bu/acre + 2 dry tons/acre)</label>

<label class="wq_answerTxtCtr">Corn - grain (120 bu/acre)</label>

<label class="wq_answerTxtCtr">Sorghum - grain (90 bu/acre)</label>

Correct! Wrong!

Correct answer:
Alfalfa - 6 dry tons per acre

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Lacustrine soils are those that have been laid down by one of these:

<label class="wq_answerTxtCtr">glaciers</label>

<label class="wq_answerTxtCtr">water</label>

<label class="wq_answerTxtCtr">volcanos</label>

Correct! Wrong!

Explanation:
Lacustrine soils are those that have been deposited in lake beds after having been transported by glaciers, rivers, and streams.

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What type of soil is most prone to experience nitrogen leaching?

<label class="wq_answerTxtCtr">compacted soil</label>

<label class="wq_answerTxtCtr">silty clay soil</label>

<label class="wq_answerTxtCtr">sandy soil</label>

Correct! Wrong!

Explanation:
While heavy, poorly drained soils may lose nitrogen through denitrification, sandy soils may lose nitrogen through leaching.

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Which of the following insecticides can be used on organically grown crops?

<label class="wq_answerTxtCtr">baythroid</label>

<label class="wq_answerTxtCtr">lorsban</label>

<label class="wq_answerTxtCtr">Bacillus thuringiensis</label>

<label class="wq_answerTxtCtr">none of the above</label>

Correct! Wrong!

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.

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After a preemergence application, rainfall is required to:

<label class="wq_answerTxtCtr">decrease the rate of chemical hydrolysis</label>

<label class="wq_answerTxtCtr">move the herbicide into the weed germination zone</label>

<label class="wq_answerTxtCtr">decrease the chance of herbicide movement into ground water</label>

<label class="wq_answerTxtCtr">decrease the rate of microbial activity</label>

Correct! Wrong!

Correct answer: ,br> move the herbicide into the weed germination zone

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Which of the following leaves is most crucial to grain fill in the production of rice?

<label class="wq_answerTxtCtr">all leaves are equally important</label>

<label class="wq_answerTxtCtr">leaves produced while tillering</label>

<label class="wq_answerTxtCtr">none of the above</label>

Correct! Wrong!

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.

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An annual plant is one that:

<label class="wq_answerTxtCtr">a plant that grows, flowers and reproduces in one growing season</label>

<label class="wq_answerTxtCtr">a plant that reproduces only by vegetative parts</label>

<label class="wq_answerTxtCtr">a plant that lives more or less indefinitely, keeps coming back each year</label>

<label class="wq_answerTxtCtr">a plant that grows one year then flowers and reproduces the neck</label>

Correct! Wrong!

Correct answer:
a plant that grows, flowers and reproduces in one growing season

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Agronomy Practice Test

Agronomy Practice Test

In order to grow, which of the following crops would need the most phosphorus?

Lacustrine soils are those that have been laid down by one of these:

What type of soil is most prone to experience nitrogen leaching?

Which of the following insecticides can be used on organically grown crops?

After a preemergence application, rainfall is required to:

Which of the following leaves is most crucial to grain fill in the production of rice?

An annual plant is one that:

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