Agronomy Written Test Questions And Answers 100% Verified.
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Agronomy Written
Agronomy Written Test Questions And Answers 100% Verified.
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...
Agronomy Written Test Questions And
Answers 100% Verified.
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
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
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
How do annual weeds reproduce? - correct answer. sexually
Why do contact herbicides have limited effectiveness on perennial weeds with
underground storage organs? - correct answer. 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? - correct answer. artificial weed dispersal
What is the best reason why weeds are controlled in agricultural fields? - correct
answer. Weed populations compete with crops or pasture for water, nutrients, light,
and space.
Nymphs are associated with ____________. - correct answer. incomplete
metamorphosis
What type of mouthparts do insects that cut, tear, crush, and chomp leaves, stems,
roots, flowers, and fruit have? - correct answer. Chewing
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