AGRONOMY WRITTEN TEST QUESTIONS AND
CORRECT ANSWERS
Who is given credit for discovering that soybeans were an excellent source of protein and oil and for
encouraging farmers to rotate their crops with soybeans? - Correct Answer George Washington Carver
What term is used to describe fine brown or gray hairs on the leaves, stems, and pods of
soybeans? - Correct Answer pubescence
Which of the following is a true statement regarding soybeans? - Correct Answer Soybeans are generally
considered a source of complete protein.
The top 2 states in terms of soybean production? - Correct Answer Iowa and Illinois
A (n) _________ is a plant that can fix nitrogen from the air in the soil - Correct Answer legume
Living organisms that cause disease are often referred to as ______. - Correct Answer pathogens
Which of the following is a benefit of integrated pest management? - Correct Answer reduced pesticide
costs
Economic injury level is _____. - Correct Answer the point at which the cost of pest control equals the
revenue loss caused by a
pest
Which method of pest control involves making the crop environment unsuitable for pests to feed,
live, or reproduce? - Correct Answer cultural
What are used to kill unwanted plants? - Correct Answer herbicides
What is caused by environmental imbalances and cannot be spread to other plants? - Correct Answer
noninfectious disease
,AGRONOMY WRITTEN TEST QUESTIONS AND
CORRECT ANSWERS
What are the three components of the disease triangle? - Correct Answer a susceptible host, a causal
agent, and environmental conditions
What are the principle causes of most diseases that affect agricultural crops? - Correct Answer Fungi
Which of the following is a cultural/physical method used to manage pest populations? - Correct Answer
removing and destroying infected plants
What is a pathogen? - Correct Answer a living, disease-producing agent
Optimum care of plants through irrigation and fertilization reduce weed, disease, and insect problems.
Which type of disease control measure do these represent? - Correct Answer cultural
Use of beneficial predatory insects is an example of which type of pest control? - Correct Answer
biological
Why is the implementation of an IPM program beneficial to the environment? - Correct Answer There is
reduced contamination and degradation of soil and water.
A grower notices that a crop displays yellow streaking and stunted growth and identifies the problem as
virus-related. How would this type of disturbance be classified? - Correct Answer infectious
diseaseinfectious disease
What is a tiny, hair-like roundworm that feeds on the roots of plants? - Correct Answer nematode
What is a main objective of cultural control of plant pests? - Correct Answer maintaining healthy plants
by providing optimal growing conditions
What is the first step in choosing an insecticide for pest control? - Correct Answer properly identify the
pest
, AGRONOMY WRITTEN TEST QUESTIONS AND
CORRECT ANSWERS
What is a nonselective herbicide? - Correct Answer one that will kill any plant with which it comes in
contact
__________________ are absorbed by the roots or other plant parts and moved throughout the plant
by vascular tissues - Correct Answer Translocated herbicides
Dicot plant weeds including dandelions, ground ivy, plantain, and spurge are called __________. -
Correct Answer broadleaf weeds
What describes biological weed control? - Correct Answer control uses insects, diseases, predators, or
other plants that are harmful to weeds without causing damage to crops
What type of weed is injurious to crops, people, or livestock? - Correct Answer noxious
What type of pesticide is used to kill unwanted plants? - Correct Answer herbicides
A farmer wants to eliminate ragweed and pigweed that are competing with corn in a field. What type of
herbicide should she use? - Correct Answer a selective herbicide
What classification of herbicides is applied before the weeds and/or crop emerges, but after the crop
has been seeded? - Correct Answer preemergent herbicides
What refers to how herbicides kill weeds, such as, seedling growth inhibitors and photosynthesis
inhibitors? - Correct Answer mode of action
What is the most effective herbicide to use on stubborn perennial weeds such as Canadian thistle that
have extensive rhizomes from which new shoots emerge? - Correct Answer systemic
Annual grasses and small-seeded broadleaf weeds can be controlled in sunflower crops by applying the
herbicide before the sunflower is seeded. How would this treatment be classified? - Correct Answer pre-
plant
CORRECT ANSWERS
Who is given credit for discovering that soybeans were an excellent source of protein and oil and for
encouraging farmers to rotate their crops with soybeans? - Correct Answer George Washington Carver
What term is used to describe fine brown or gray hairs on the leaves, stems, and pods of
soybeans? - Correct Answer pubescence
Which of the following is a true statement regarding soybeans? - Correct Answer Soybeans are generally
considered a source of complete protein.
The top 2 states in terms of soybean production? - Correct Answer Iowa and Illinois
A (n) _________ is a plant that can fix nitrogen from the air in the soil - Correct Answer legume
Living organisms that cause disease are often referred to as ______. - Correct Answer pathogens
Which of the following is a benefit of integrated pest management? - Correct Answer reduced pesticide
costs
Economic injury level is _____. - Correct Answer the point at which the cost of pest control equals the
revenue loss caused by a
pest
Which method of pest control involves making the crop environment unsuitable for pests to feed,
live, or reproduce? - Correct Answer cultural
What are used to kill unwanted plants? - Correct Answer herbicides
What is caused by environmental imbalances and cannot be spread to other plants? - Correct Answer
noninfectious disease
,AGRONOMY WRITTEN TEST QUESTIONS AND
CORRECT ANSWERS
What are the three components of the disease triangle? - Correct Answer a susceptible host, a causal
agent, and environmental conditions
What are the principle causes of most diseases that affect agricultural crops? - Correct Answer Fungi
Which of the following is a cultural/physical method used to manage pest populations? - Correct Answer
removing and destroying infected plants
What is a pathogen? - Correct Answer a living, disease-producing agent
Optimum care of plants through irrigation and fertilization reduce weed, disease, and insect problems.
Which type of disease control measure do these represent? - Correct Answer cultural
Use of beneficial predatory insects is an example of which type of pest control? - Correct Answer
biological
Why is the implementation of an IPM program beneficial to the environment? - Correct Answer There is
reduced contamination and degradation of soil and water.
A grower notices that a crop displays yellow streaking and stunted growth and identifies the problem as
virus-related. How would this type of disturbance be classified? - Correct Answer infectious
diseaseinfectious disease
What is a tiny, hair-like roundworm that feeds on the roots of plants? - Correct Answer nematode
What is a main objective of cultural control of plant pests? - Correct Answer maintaining healthy plants
by providing optimal growing conditions
What is the first step in choosing an insecticide for pest control? - Correct Answer properly identify the
pest
, AGRONOMY WRITTEN TEST QUESTIONS AND
CORRECT ANSWERS
What is a nonselective herbicide? - Correct Answer one that will kill any plant with which it comes in
contact
__________________ are absorbed by the roots or other plant parts and moved throughout the plant
by vascular tissues - Correct Answer Translocated herbicides
Dicot plant weeds including dandelions, ground ivy, plantain, and spurge are called __________. -
Correct Answer broadleaf weeds
What describes biological weed control? - Correct Answer control uses insects, diseases, predators, or
other plants that are harmful to weeds without causing damage to crops
What type of weed is injurious to crops, people, or livestock? - Correct Answer noxious
What type of pesticide is used to kill unwanted plants? - Correct Answer herbicides
A farmer wants to eliminate ragweed and pigweed that are competing with corn in a field. What type of
herbicide should she use? - Correct Answer a selective herbicide
What classification of herbicides is applied before the weeds and/or crop emerges, but after the crop
has been seeded? - Correct Answer preemergent herbicides
What refers to how herbicides kill weeds, such as, seedling growth inhibitors and photosynthesis
inhibitors? - Correct Answer mode of action
What is the most effective herbicide to use on stubborn perennial weeds such as Canadian thistle that
have extensive rhizomes from which new shoots emerge? - Correct Answer systemic
Annual grasses and small-seeded broadleaf weeds can be controlled in sunflower crops by applying the
herbicide before the sunflower is seeded. How would this treatment be classified? - Correct Answer pre-
plant
