AGRONOMY WRITTEN TEST QUESTIONS
AND ANSWERS | LATEST 2024/25 | RATED
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? -
George Washington Carver
What term is used to describe fine brown or gray hairs on the leaves, stems, and
pods of soybeans? - pubescence
Which of the following is a true statement regarding soybeans? - Soybeans are
generally considered a source of complete protein.
The top 2 states in terms of soybean production? - Iowa and Illinois
A (n) is a plant that can fix nitrogen from the air in the soil - legume
Living organisms that cause disease are often referred to as .- pathogens
Which of the following is a benefit of integrated pest management? - reduced
pesticide costs
Economic injury level is . - the point at which the cost of pest control equalsthe
revenue loss caused by a
pest
Which method of pest control involves making the crop environment unsuitable for
pests to feed,
live, or reproduce? - cultural
What are used to kill unwanted plants? - herbicides
What is caused by environmental imbalances and cannot be spread to other plants?
-noninfectious disease
What are the three components of the disease triangle? - a susceptible host, a
causal agent, and environmental conditions
What are the principle causes of most diseases that affect agricultural crops? -Fungi
Which of the following is a cultural/physical method used to manage pest
populations?
,- removing and destroying infected plants
What is a pathogen? - 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? -
cultural
Use of beneficial predatory insects is an example of which type of pest control? -
biological
Why is the implementation of an IPM program beneficial to the environment? -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? - infectious diseaseinfectious disease
What is a tiny, hair-like roundworm that feeds on the roots of plants? - nematode
What is a main objective of cultural control of plant pests? - maintaining healthyplants
by providing optimal growing conditions
What is the first step in choosing an insecticide for pest control? - properly identifythe
pest
What is a nonselective herbicide? - one that will kill any plant with which it
comes incontact
are absorbed by the roots or other plant parts and movedthroughout the plant
by vascular tissues - Translocated herbicides
Dicot plant weeds including dandelions, ground ivy, plantain, and spurge are called
.- broadleaf weeds
What describes biological weed control? - 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? - noxiousWhat type
of pesticide is used to kill unwanted plants? - herbicides
A farmer wants to eliminate ragweed and pigweed that are competing with corn in a
field. What type of herbicide should she use? - a selective herbicide
, What classification of herbicides is applied before the weeds and/or crop emerges,
butafter the crop has been seeded? - preemergent herbicides
What refers to how herbicides kill weeds, such as, seedling growth inhibitors and
photosynthesis inhibitors? - 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? -
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? - pre-plant
How do annual weeds reproduce? - sexually
Why do contact herbicides have limited effectiveness on perennial weeds with
underground storage organs? - They only kill the plant tissue with which they come
in contact.
Unclean crop seed may contain weed seed and may be planted along with the crop
seed. How is this process categorized? - artificial weed dispersal
What is the best reason why weeds are controlled in agricultural fields? - Weed
populations compete with crops or pasture for water, nutrients, light, and space.
Nymphs are associated with .- incomplete metamorphosis
What type of mouthparts do insects that cut, tear, crush, and chomp leaves, stems,
roots, flowers, and fruit have? - Chewing
What type of insect management is accomplished with the physical removal or
exclusion of insect pests? - mechanical
Which family of insecticides includes plant toxins such as, caffeine, nicotine,
pyrethrum, and rotenone and bacterial diseases including Bacillus thuringiensis? -
biologicals
How does a contact insecticide enter an insect's body? - It is absorbed through
theexterior of an insect
Why would a vegetable grower want to avoid using a systemic pesticide? - The
pesticide could find its way into the plant organs that are eaten.
How does a fumigant insecticide enter an insect's body? - It enters the respiratory
system of the insect.
AND ANSWERS | LATEST 2024/25 | RATED
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? -
George Washington Carver
What term is used to describe fine brown or gray hairs on the leaves, stems, and
pods of soybeans? - pubescence
Which of the following is a true statement regarding soybeans? - Soybeans are
generally considered a source of complete protein.
The top 2 states in terms of soybean production? - Iowa and Illinois
A (n) is a plant that can fix nitrogen from the air in the soil - legume
Living organisms that cause disease are often referred to as .- pathogens
Which of the following is a benefit of integrated pest management? - reduced
pesticide costs
Economic injury level is . - the point at which the cost of pest control equalsthe
revenue loss caused by a
pest
Which method of pest control involves making the crop environment unsuitable for
pests to feed,
live, or reproduce? - cultural
What are used to kill unwanted plants? - herbicides
What is caused by environmental imbalances and cannot be spread to other plants?
-noninfectious disease
What are the three components of the disease triangle? - a susceptible host, a
causal agent, and environmental conditions
What are the principle causes of most diseases that affect agricultural crops? -Fungi
Which of the following is a cultural/physical method used to manage pest
populations?
,- removing and destroying infected plants
What is a pathogen? - 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? -
cultural
Use of beneficial predatory insects is an example of which type of pest control? -
biological
Why is the implementation of an IPM program beneficial to the environment? -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? - infectious diseaseinfectious disease
What is a tiny, hair-like roundworm that feeds on the roots of plants? - nematode
What is a main objective of cultural control of plant pests? - maintaining healthyplants
by providing optimal growing conditions
What is the first step in choosing an insecticide for pest control? - properly identifythe
pest
What is a nonselective herbicide? - one that will kill any plant with which it
comes incontact
are absorbed by the roots or other plant parts and movedthroughout the plant
by vascular tissues - Translocated herbicides
Dicot plant weeds including dandelions, ground ivy, plantain, and spurge are called
.- broadleaf weeds
What describes biological weed control? - 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? - noxiousWhat type
of pesticide is used to kill unwanted plants? - herbicides
A farmer wants to eliminate ragweed and pigweed that are competing with corn in a
field. What type of herbicide should she use? - a selective herbicide
, What classification of herbicides is applied before the weeds and/or crop emerges,
butafter the crop has been seeded? - preemergent herbicides
What refers to how herbicides kill weeds, such as, seedling growth inhibitors and
photosynthesis inhibitors? - 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? -
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? - pre-plant
How do annual weeds reproduce? - sexually
Why do contact herbicides have limited effectiveness on perennial weeds with
underground storage organs? - They only kill the plant tissue with which they come
in contact.
Unclean crop seed may contain weed seed and may be planted along with the crop
seed. How is this process categorized? - artificial weed dispersal
What is the best reason why weeds are controlled in agricultural fields? - Weed
populations compete with crops or pasture for water, nutrients, light, and space.
Nymphs are associated with .- incomplete metamorphosis
What type of mouthparts do insects that cut, tear, crush, and chomp leaves, stems,
roots, flowers, and fruit have? - Chewing
What type of insect management is accomplished with the physical removal or
exclusion of insect pests? - mechanical
Which family of insecticides includes plant toxins such as, caffeine, nicotine,
pyrethrum, and rotenone and bacterial diseases including Bacillus thuringiensis? -
biologicals
How does a contact insecticide enter an insect's body? - It is absorbed through
theexterior of an insect
Why would a vegetable grower want to avoid using a systemic pesticide? - The
pesticide could find its way into the plant organs that are eaten.
How does a fumigant insecticide enter an insect's body? - It enters the respiratory
system of the insect.
