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Agronomy Written Test Questions and Complete Solutions Graded A+
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Agronomy Written Test Questions and Complete Solutions Graded A+
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Agronomy Written TestQuestions and Complete
Solutions Graded A+
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? - Answer: George Washington Carver
What term is used to describe fine brown or gray hairs on the leaves, stems, and pods of
soybeans? - Answer: pubescence
Which of the following is a true statement regarding soybeans? - Answer: Soybeans are generally
considered a source of complete protein.
The top 2 states in terms of soybean production? - Answer: Iowa and Illinois
A (n) _________ is a plant that can fix nitrogen from the air in the soil - Answer: legume
Living organisms that cause disease are often referred to as ______. - Answer: pathogens
Which of the following is a benefit of integrated pest management? - Answer: reduced pesticide costs
Economic injury level is _____. - 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? - Answer: cultural
,What are used to kill unwanted plants? - Answer: herbicides
What is caused by environmental imbalances and cannot be spread to other plants? - Answer:
noninfectious disease
What are the three components of the disease triangle? - Answer: a susceptible host, a causal agent,
and environmental conditions
What are the principle causes of most diseases that affect agricultural crops? - Answer: Fungi
Which of the following is a cultural/physical method used to manage pest populations? - Answer:
removing and destroying infected plants
What is a pathogen? - 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? - Answer: cultural
Use of beneficial predatory insects is an example of which type of pest control? - Answer: biological
Why is the implementation of an IPM program beneficial to the environment? - 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? - Answer: infectious diseaseinfectious
disease
What is a tiny, hair-like roundworm that feeds on the roots of plants? - Answer: nematode
What is a main objective of cultural control of plant pests? - Answer: maintaining healthy plants by
providing optimal growing conditions
, What is the first step in choosing an insecticide for pest control? - Answer: properly identify the pest
What is a nonselective herbicide? - 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 - Answer: Translocated herbicides
Dicot plant weeds including dandelions, ground ivy, plantain, and spurge are called __________. -
Answer: broadleaf weeds
What describes biological weed control? - 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? - Answer: noxious
What type of pesticide is used to kill unwanted plants? - 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? - Answer: a selective herbicide
What classification of herbicides is applied before the weeds and/or crop emerges, but after the crop
has been seeded? - Answer: preemergent herbicides
What refers to how herbicides kill weeds, such as, seedling growth inhibitors and photosynthesis
inhibitors? - 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? - 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? - Answer: pre-plant
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