Exam (elaborations)
2018 Agronomy Test (1).
2018 Agronomy Test (1).
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1. Which of the following essential nutrients is considered a secondary nutrient?a. phosphorus
b. calcium
c. potassium
d. manganese
e. zinc - CORRECT ANSWER-b. calcium
2. From the following list, which oral LD50 value represents the most toxic poison?
a. 300 mg/kg
b. 480 mg/kg
c. 5000 mg/kg
d. 101 mg/kg - CORRECT ANSWER-d. 101 mg/kg
3. If you wanted to increase the CEC (cation exchange capacity) of your soil, which
of the following additives would you add to your soil?
a. apply ammonium sulfate to the soil at least once a year
b. rotate your crops annually
c. add organic matter (compost, manure, green manure crops, etc.) to your soil
d. moldboard plow your soil to incorporate crop residues - CORRECT ANSWER-c.
add organic matter (compost, manure, green manure crops, etc.) to your soil
4. If a plant continues to produce more leaves and stems after it has begun to flower,
that growth habit is called which of the following:
a. dioecious
b. epinasty
c. determinate
d. monoecious
e. indeterminate - CORRECT ANSWER-e. indeterminate
5. If you were using a chlorophyll meter to determine the nutrient status of a corn
crop, which nutrient below is most likely to be correlated with the level of chlorophyll?
a. N
b. P
c. K
d. Fe
e. S - CORRECT ANSWER-a. N
, 6. If a 10-25-10 fertilizer costs $450/U.S. ton (2,000 lbs in a U.S. ton), how much did
you pay per pound of all the nutrients present (round to the nearest penny)?
a. $0.27/lb
b. $0.50/lb
c. $0.89/lb
d. $1.01/lb - CORRECT ANSWER-b. $0.50/lb
7. A farmer has all-inclusive production costs for his crop of $884 per acre. The
farmer sold the crop ahead of harvest season using a future's contract for $5.20 per
bushel so how many bushels per acre does the farmer need to achieve to cover just
the production costs?
a. 170 bushels per acre
b. 180 bushels per acre
c. 200 bushels per acre
d. 225 bushels per acre - CORRECT ANSWER-a. 170 bushels per acre
8. Which of the following is a plant available form of nitrogen?
a. N2
b. NH3
c. NO3
d. NO2
e. NO - CORRECT ANSWER-c. NO3
9. A raceme is considered a type of what?
a. tiller
b. inflorescence
c. root structure
d. leaf structure - CORRECT ANSWER-b. inflorescence
10. Which of the following plants are considered examples of pulses?
a. barley, rye, rice
b. white clover, alfalfa, crimson clover
c. canola, flax, corn
d. peas, lentils, dried beans - CORRECT ANSWER-d. peas, lentils, dried beans
11. What is the primary role of phosphorus in plant growth?
a. enzymatic activation
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